Updated on 2023/11/03

写真a

 
JIMI Naoto
 
Organization
Graduate School of Science Sugashima Marine Biological Laboratory Lecturer
Graduate School
Graduate School of Science
Undergraduate School
School of Science Department of Biological Science
Title
Lecturer

Degree 1

  1. 博士(理学) ( 2019.3   北海道大学 ) 

Research Interests 8

  1. phylogeny

  2. biodiversity

  3. 生態進化

  4. Annelida

  5. deep-sea biology

  6. morphology

  7. polychaete

  8. taxonomy

Research Areas 1

  1. Life Science / Biodiversity and systematics  / Systematics

Current Research Project and SDGs 1

  1. 海洋生物の多様性解明

Research History 7

  1. Nagoya University   Lecturer

    2023.4

  2. Universiti Sains Malaysia (USM)   Academic Fellow

    2021.8

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    Country:Malaysia

  3. Nagoya University   Graduate School of Science, Sugashima Marine Biological Laboratory   Assistant Professor

    2021.7 - 2023.3

  4. 国立極地研究所 日本学術振興会 特別研究員 PD

    2019.4 - 2021.6

  5. JSPS Research Fellowships for Young Scientists DC2

    2017.4 - 2019.3

  6. 北海道ハイテクノロジー専門学校   非常勤講師

    2016.4 - 2017.3

  7. Japan Agency for Marine-Earth Science and Technology

    2013.4 - 2016.3

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Education 3

  1. 北海道大学大学院   理学院   自然史科学専攻

    2016.4 - 2019.3

  2. Hiroshima University   Graduate School of Biosphere Science

    2014.4 - 2016.3

  3. Tokyo University of Marine Science and Technology   Faculty of Marine Science   Department of Marine Biosciences

    2010.4 - 2014.3

Professional Memberships 3

  1. THE ZOOLOGICAL SOCIETY OF JAPAN

  2. THE JAPANESE SOCIETY OF SYSTEMATIC ZOOLOGY

  3. THE JAPANESE ASSOCIATION OF BENTHOLOGY

Committee Memberships 1

  1. The Japanese Society of Systematic Zoology   Species Diversity Associate Editor  

    2020.4   

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    Committee type:Academic society

Awards 3

  1. 奨励賞

    2023.6   日本動物分類学会  

  2. Zoological Science Award

    2020.6   Life Cycle of the Japanese Green Syllid, Megasyllis nipponica (Annelida: Syllidae): Field Collection and Establishment of Rearing System

    Toru Miura, Kohei Oguchi, Mayuko Nakamura, Naoto Jimi, Sakiko Miura, Yoshinobu Hayashi, Shigeyuki Koshikawa, M. Teresa Aguado

  3. 若手奨励賞

    2016.3   ブルーアースシンポジウム  

    自見直人

 

Papers 80

  1. Two new species of Parahesione (Annelida: Hesionidae) associated with ghost shrimps (Crustacea: Decapoda) and their phylogenetic relationships Reviewed International coauthorship

    Naoto Jimi, Hiroki Nakajima, Taigi Sato, Brett C Gonzalez, Sau Pinn Woo, Greg W Rouse, Temir A Britayev

    PeerJ   Vol. 11   page: e16346   2023.11

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.7717/peerj.16346

  2. Synonymy of the Scale Worm Hesperonoe urechis with Arctonoella sinagawaensis (Annelida: Polynoidae), Newly Recorded from the Seto Inland Sea, Western Japan, with Remarks on Symbiosis with the Spoon Worm Urechis unicinctus (Annelida: Thalassematidae) Reviewed

    Masanori Sato, Naoto Jimi, Gyo Itani, Yumi Henmi, Shuji Kobayashi

    Species Diversity   Vol. 28 ( 2 ) page: 147 - 163   2023.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japanese Society of Systematic Zoology  

    DOI: 10.12782/specdiv.28.147

  3. From commensalism to parasitism within a genus-level clade of barnacles Reviewed

    Hiromi Kayama Watanabe, Daisuke Uyeno, Luna Yamamori, Naoto Jimi, Chong Chen

    Biology Letters   Vol. 19 ( 7 )   2023.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Royal Society  

    Understanding how animals evolve to become parasites is key to unravelling how biodiversity is generated as a whole, as parasites could account for half of all species richness. Two significant impediments to this are that parasites fossilize poorly and that they retain few clear shared morphological features with non-parasitic relatives. Barnacles include some of the most astonishingly adapted parasites with the adult body reduced to just a network of tubes plus an external reproductive body, but how they originated from the sessile, filter-feeding form is still a mystery. Here, we present compelling molecular evidence that the exceedingly rare scale-worm parasite barnacle Rhizolepas is positioned within a clade comprising species currently assigned to Octolasmis , a genus exclusively commensal with at least six different phyla of animals. Our results imply that species in this genus-level clade represent an array of species at various transitional stages from free-living to parasitic in terms of plate reduction and host-parasite intimacy. Diverging only about 19.15 million years ago, the route to parasitism in Rhizolepas was associated with rapid modifications in anatomy, a pattern that was likely true for many other parasitic lineages.

    DOI: 10.1098/rsbl.2022.0550

    Web of Science

    Other Link: https://royalsocietypublishing.org/doi/full-xml/10.1098/rsbl.2022.0550

  4. At the edge of the sea: the supralittoral nemertean, Acteonemertes orientalis sp. nov. (Nemertea: Eumonostilifera: Plectonemertidae) from Japan Reviewed

    Natsumi Hookabe, Yuma Fujino, Naoto Jimi, Rei Ueshima

    Invertebrate Systematics   Vol. 37 ( 6 ) page: 444 - 456   2023.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:CSIRO Publishing  

    Ribbon worms (phylum Nemertea) are found in oceans worldwide; however, only a few inhabit terrestrial, semiterrestrial and freshwater environments. In our study, we describe Acteonemertes orientalis sp. nov., a new species of Plectonemertidae Gibson, 1990 and the first plectonemertid discovered in Japan. The species was found in the supralittoral zone, from which nemerteans have rarely been reported and inhabits areas under rocks, wave-dissipating concrete blocks, and fallen leaves and stocks, along the coast of the Sea of Japan. Multi-locus phylogenetic analyses based on two mitochondrial (16S rRNA and cytochrome c oxidase subunit I) and two nuclear gene markers (18S rRNA and 28S rRNA) revealed that A. orientalis sp. nov. formed a clade with Leptonemertes cf. chalicophora collected from Florida. Although the external and internal morphology of A. orientalis sp. nov. is largely consistent with the generic diagnosis, this species differs in having a large proboscis. Based on the molecular and morphological data, we propose to amend the diagnosis of Acteonemertes by excluding proboscis size. ZooBank: urn:lsid:zoobank.org:pub:BBBE9549-5DCE-424F-9A39-930F8243C28B

    DOI: 10.1071/is22066

    Web of Science

  5. Insights into the diversification of deep-sea endoparasites: Phylogenetic relationships within Dendrogaster (Crustacea: Ascothoracida) and a new species description from a western Pacific seamount Reviewed

    Naoto Jimi, Itaru Kobayashi, Takeya Moritaki, Sau Pinn Woo, Shinji Tsuchida, Yoshihiro Fujiwara

    Deep Sea Research Part I: Oceanographic Research Papers   Vol. 196   page: 104025 - 104025   2023.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.dsr.2023.104025

    Web of Science

  6. Theama japonica sp. nov., an Interstitial Polyclad Flatworm Showing a Wide Distribution along Japanese Coasts Reviewed

    Aoi Tsuyuki, Yuki Oya, Naoto Jimi, Natsumi Hookabe, Shinta Fujimoto, Hiroshi Kajihara

    Zoological Science   Vol. 40 ( 3 ) page: 262 - 272   2023.5

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    Publishing type:Research paper (scientific journal)   Publisher:Zoological Society of Japan  

    DOI: 10.2108/zs220105

    Web of Science

  7. A New Species of Branchellion (Hirudinea: Piscicolidae) Parasitizing the Gills of Short-Tail Stingrays (Batoidea: Dasyatidae) from the West Pacific Reviewed

    Naoto Jimi, Junpei Shinji, Natsumi Hookabe, Masanori Okanishi, Sau Pinn Woo, Takafumi Nakano

    Zoological Science   Vol. 40 ( 4 ) page: 308 - 313   2023.5

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Zoological Society of Japan  

    DOI: 10.2108/zs220057

    Web of Science

  8. Insights into the diversification of deep-sea endoparasites: Phylogenetic relationships within Dendrogaster (Crustacea: Ascothoracida) and a new species description from a western Pacific seamount Reviewed International coauthorship

    Naoto Jimi, Itaru Kobayashi, Takeya Moritaki, Sau Pinn Woo, Shinji Tsuchida, Yoshihiro Fujiwara

    Deep Sea Research Part I: Oceanographic Research Papers   Vol. 196   page: 104025   2023.3

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.dsr.2023.104025

  9. Investigating the diversity of bioluminescent marine worm Polycirrus (Annelida), with description of three new species from the Western Pacific Reviewed International coauthorship

    Naoto Jimi, Manabu Bessho-Uehara, Koji Nakamura, Masahiko Sakata, Taro Hayashi, Shusei Kanie, Yasuo Mitani, Yoshihiro Ohmiya, Aoi Tsuyuki, Yuzo Ota, Sau Pinn Woo, Katsunori Ogoh

    Royal Society Open Science   Vol. 10   page: 230039   2023.3

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  10. Four new species of coral- and rock-boring polychaetes Daylithos (Annelida, Flabelligeridae) from the Pacific Ocean Reviewed

    Naoto Jimi, Toshihiko Fujita, Sau Pinn Woo

    Zoosystematics and Evolution   Vol. 99 ( 1 ) page: 149 - 159   2023.2

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Pensoft Publishers  

    Four new species of Daylithos (Flabelligeridae, Annelida) are described, based on specimens collected from rocks and corals of Japan and Malaysia. Daylithos, contains one species, D. parmatus, currently reported from Japan. However, the specimens described in previous reports were unable to be located and thus deemed lost. Therefore, it was unclear whether the specimens described as D. parmatus in those studies were, indeed, the species. In Malaysia, D. parmatus has also been known as popular species from corals. The specimens collected from Langkawi (Malaysia) showed clearly different characters from D. parmatus and other congeners. In this study, we describe four new species, Daylithos japonicus, D. amamiensis, D. sugashimaensis and D. langkawiensis, based on newly-collected specimens from several part of Japan and Malaysia. These new species can be discriminated from other congeners by body colour, presence of eyes, shape of dorsal shield, length of caruncle and arrangement of neurochaetae. We have also provided mitochondrial cytochrome c oxidase subunit I sequences of the new species.

    DOI: 10.3897/zse.99.97944

    Web of Science

    Other Link: https://zse.pensoft.net/article/97944/download/xml/

  11. Another piece for the syllid puzzle: A new species from Japan and its mitochondrial genome reveal the enigmatic Clavisyllis (Phyllodocida: Syllidae) as a member of Eusyllinae Reviewed

    Benjamin Cejp, Naoto Jimi, M. Teresa Aguado

    Zootaxa   Vol. 5244 ( 4 ) page: 341 - 360   2023.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Magnolia Press  

    The phylogenetic relationships of Syllidae have been analyzed in several studies during the last decades, resulting in highly congruent topologies. Most of the subfamilies were found to be monophyletic, while other groups (Eusyllinae and several genera) have been reorganized attending their phylogenetic relationships. However, there are still several enigmatic genera, which could not be assigned to any of the established subgroups. These enigmatic genera usually show a combination of characters indicating relationships with several different groups, and some show morphological traits unique to Syllidae. One of the most intriguing genera, still unclassified within Syllidae is Clavisyllis Knox. Herein, we provide a complete description of a new species Clavisyllis tenjini n. sp. from Japan. We sequence the complete mitochondrial genome, compare with the available data from other syllids, and perform a phylogenetic analysis of three genes (18S, 16S, COI), traditionally used in previous studies. Clavisyllis shows a unique combination of characters within Syllidae, such as nuchal lappets and large ovoid dorsal cirri. The new species has additional anterior appendages that have not been found in any other syllid. Our results show the genus is a member of Eusyllinae, closely related to Pionosyllis Malmgren. The mitochondrial gene order agrees with the considered plesiomorphic gene order in Annelida, which is present in all members of Eusyllinae investigated so far. Clavisyllis reproduces by epigamy, the reproductive mode of members of Eusyllinae. The present study contributes to the systematics of Syllidae, a complex group with a large number of species and striking reproductive modes.

    DOI: 10.11646/zootaxa.5244.4.2

  12. A new oerstediid discovered from wood falls in the Sea of Kumano, Japan: Description of Rhombonemertes rublinea gen. et sp. nov. (Nemertea: Eumonostilifera) Reviewed

    Natsumi Hookabe, Takeya Moritaki, Naoto Jimi, Rei Ueshima

    Zoologischer Anzeiger   Vol. 301   page: 154 - 162   2022.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jcz.2022.10.003

    Web of Science

  13. Unearthing the diversity of Japanese Magelona (Annelida: Magelonidae); three species new to science, and a redescription of Magelona japonica Reviewed International coauthorship

    Taylor Abbie, Mortimer Kate, Jimi Naoto

    Zootaxa     2022.10

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.11646/zootaxa.5196.4.1

  14. Unearthing the diversity of Japanese Magelona (Annelida: Magelonidae); three species new to science, and a redescription of Magelona japonica Reviewed

    ABBIE TAYLOR, KATE MORTIMER, NAOTO JIMI

    Zootaxa   Vol. 5196 ( 4 ) page: 451 - 491   2022.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Magnolia Press  

    Whilst seven species of magelonids have been originally described from the North-Western Pacific Ocean, only two have been from Japanese waters. Given the often high diversity of magelonid species within relatively small regions, the number of Japanese Magelona species is likely to be higher. The validity of several recorded species from the region has been additionally called into question, and the urgent need for a review of magelonids of Japan highlighted. Newly collected samples of magelonids have emphasised the presence of three species new to science occurring off Japan, herein described: Magelona alba sp. nov., Magelona armatis sp. nov., and Magelona boninensis sp. nov. A redescription of Magelona japonica is additionally provided, along with notes on a fifth species, which approaches Magelona cornuta. A dichotomous identification key to magelonid species of the North-Western Pacific Ocean, along with a table of characters for all five observed species is provided.

    DOI: 10.11646/zootaxa.5196.4.1

    Web of Science

  15. Worm on worm: Two rare genera of Calamyzinae (Annelida, Chrysopetalidae), with a description of new species Reviewed

    Naoto Jimi, Shinji Tsuchida, Hiromi Kayama Watanabe, Yasuhiko Ohara, Hiroyuki Yokooka, Sau Pinn Woo, Yoshihiro Fujiwara

    Parasitology International   Vol. 90   page: 102619 - 102619   2022.10

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.parint.2022.102619

    Web of Science

  16. 和歌山県 (串本・古座) 沿岸域での海産無脊椎動物相 (多毛類、ヒモムシ類、ホヤ類) 調査の報告

    長谷川尚弘, 自見直人, 波々伯部夏美

    ニッチェ・ライフ   Vol. 10   page: 59 - 65   2022.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  17. Taxonomic revision of the free-living marine nematode genus Deontostoma (Enoplida: Leptosomatidae) and inclusion of a new species from the Southern Ocean Reviewed

    Shimada Daisuke, Jimi Naoto

    Nematology     2022.9

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1163/15685411-bja10189

  18. Taxonomic revision of the free-living marine nematode genus Deontostoma (Enoplida: Leptosomatidae) and inclusion of a new species from the Southern Ocean Reviewed

    Daisuke Shimada, Naoto Jimi

    Nematology   Vol. 24 ( 9 ) page: 1031 - 1047   2022.9

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Brill  

    Summary

    A new species of free-living marine nematode, Deontostoma quadridentatum sp. nov., is described from a deep-sea sediment sample collected off the South Orkney Islands, the Southern Ocean, during a cruise (KH-19-6-Leg 4) conducted on the R/V Hakuho-Maru. Deontostoma quadridentatum sp. nov. differs from its congeners by the possession of: i) a cephalic capsule with a smooth posterior edge and without intralobar lacunae; ii) interlobar fenestrae with two posterior incisions; iii) four odontia on each mandible; iv) three onchia; v) spicules with velum and lateral process; vi) gubernacula with a hollow triangular crus, vii) one ventromedian supplement; viii) two precloacal subventral rows consisting of 8-10 setae and 12-20 papillae; and ix) by the lack of ocelli. Partial 18S rRNA and cytochrome c oxidase subunit I gene sequences were determined for D. quadridentatum sp. nov., and the diagnosis of Deontostoma and the dichotomous keys to the subfamilies of Leptosomatidae, genera of Deontostomatinae, and species of Deontostoma were revised. Two known species, Triceratonema montredonense comb. nov. and Triceratonema papillosum comb. nov., were transferred from Deontostoma. Our molecular phylogenetic analysis did not clarify the position of Deontostoma quadridentatum sp. nov., but we placed this species into Deontostoma based on morphological observations. We also tried to find a relationship between distribution and morphological characteristic because it seems that there are two phylogenetic lineages that exist in Deontostoma based on the distribution of all species. However, no such relationships could be found from our literature survey.

    DOI: 10.1163/15685411-bja10189

    Web of Science

    Other Link: https://brill.com/downloadpdf/journals/nemy/24/9/article-p1031_7.xml

  19. Molecular Phylogeny of the Genus Nipponnemertes (Nemertea: Monostilifera: Cratenemertidae) and Descriptions of 10 New Species, With Notes on Small Body Size in a Newly Discovered Clade Reviewed

    Natsumi Hookabe, Hiroshi Kajihara, Alexei V. Chernyshev, Naoto Jimi, Naohiro Hasegawa, Hisanori Kohtsuka, Masanori Okanishi, Kenichiro Tani, Yoshihiro Fujiwara, Shinji Tsuchida, Rei Ueshima

    Frontiers in Marine Science   Vol. 9   2022.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Frontiers Media SA  

    Nemerteans, or ribbon worms, have been reported from intertidal to hadal depths, often showing bathymetrically wide distribution in genus levels. Although current nemertean systematics practices require to provide DNA sequences and infer phylogenetic relationships with suitable molecular markers, previous molecular systematics on nemerteans are mostly biased toward shallow-water species. Members in the genus Nipponnemertes occur worldwide, from tropical to polar waters and intertidal to bathyal waters. Molecular phylogenetic studies are scarce for the genus; only six shallow-water species of 18 species in the genus were subject to molecular phylogeny. Thus, Nipponnemertes is one candidate that needs to be assessed by genetic approaches. In this study, we performed molecular phylogenetic analyses using 59 specimens in 23 species based on partial sequences of two mitochondrial (16S rRNA and cytochrome c oxidase subunit I) and three nuclear gene markers (18S rRNA, 28S rRNA, and histone H3). Our extensive sampling from intertidal to bathyal waters in the Northwest Pacific significantly updated the fauna of Nipponnemertes in this region from four to 17 species. We herein establish 10 new species and provide an updated species list concisely summarizing all the congeners known from the world. Our phylogenetic tree indicated three major lineages within the genus (herein referred to as “Clade A, B, and C”), each presumably characterized by the combination of morphological characters in the head region. Members in Clade A are: Nipponnemertes pulchra (Johnston, 1837), Nipponnemertes ogumai (Yamaoka, 1947), and several unidentified congeners, characterized by having demarcated head without cephalic patches; members in Clade B are: Nipponnemertes crypta sp. nov., Nipponnemertes jambio sp. nov., Nipponnemertes neonilae sp. nov., and Nipponnemertes ojimaorum sp. nov., species having demarcated head with cephalic patches; members in Clade C are: Nipponnemertes ganahai sp. nov., Nipponnemertes kozaensis sp. nov., Nipponnemertes lactea sp. nov., Nipponnemertes notoensis sp. nov., Nipponnemertes ornata sp. nov., Nipponnemertes sugashimaensis sp. nov., and two unidentified forms collected off Jogashima (Japan) and Guam (USA), species with non-demarcated head lacking cephalic patches. Furthermore, we discuss the evolution of remarkably small body size retained among Clade C.

    DOI: 10.3389/fmars.2022.906383

    Web of Science

  20. Correction to: Ramisyllis kingghidorahi n. sp., a new branching annelid from Japan (Organisms Diversity & Evolution, (2022), 22, 2, (377-405), 10.1007/s13127-021-00538-4)

    M. Teresa Aguado, Guillermo Ponz‑Segrelles, Christopher J. Glasby, Rannyele P. Ribeiro, Mayuko Nakamura, Kohei Oguchi, Akihito Omori, Hisanori Kohtsuka, Christian Fischer, Yuji Ise, Naoto Jimi, Toru Miura

    Organisms Diversity and Evolution   Vol. 22 ( 2 ) page: 407   2022.6

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    Publishing type:Research paper (scientific journal)  

    In the original version of this article, the author name Christian Fischer was incorrectly written as Christian Fisher. The original article has been corrected.

    DOI: 10.1007/s13127-022-00545-z

    Scopus

  21. The haplotype diversity of the pelagic polychaete Tomopteris (Annelida: Tomopteridae) collected from the Pacific coast off Kii Peninsula, central Japan Reviewed

    Ikuhiko Kin, Naoto Jimi, Susumu Ohtsuka, Gaku Mizuno, Toru Nakamura, Yoichi Maekawa, Yuichi Oba

    Plankton and Benthos Research   Vol. 17 ( 2 ) page: 214 - 220   2022.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Plankton Society of Japan/The Japanese Association of Benthology  

    DOI: 10.3800/pbr.17.214

    Web of Science

  22. Two new species of Branchinotogluma (Polynoidae: Annelida) from chemosynthesis-based ecosystems in Japan Reviewed

    NAOTO JIMI, CHONG CHEN, YOSHIHIRO FUJIWARA

    Zootaxa   Vol. 5138 ( 1 ) page: 17 - 30   2022.5

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Magnolia Press  

    The widely distributed polychaete family Polynoidae Kinberg, 1856 is found across all oceans and from shallow to deep waters, including deep-sea hydrothermal vents and hydrocarbon seeps. Taxa inhabiting chemosynthesis-based ecosystems are often endemic to those specific habitats commonly targeted by deep-sea mining, and understanding their species diversity is essential for shaping conservation plans. Here, we report two previously undescribed scale-worms in the genus Branchinotogluma Pettibone, 1985 from the Off Hatsushima hydrocarbon seep of Sagami Bay and the Nikko Seamount hydrothermal vent on the Izu-Ogasawara Arc, and describe them as B. nikkoensis sp. nov. and B. sagamiensis sp. nov. Branchinotogluma nikkoensis sp. nov. is distinguished from the known species by the following characters: i) ventral segmental lamellae near ventral bases of neuropodia present on segments 13–17, ii) dorsal tentacular cirri being longer than ventral tentacular cirri, iii) absence of dorsal tubercles. Branchinotogluma sagamiensis sp. nov. can be differentiated from other congeners by i) 20 segments, ii) dorsal tentacular cirri being longer than ventral tentacular cirri, iii) ventral segmental lamellae near ventral bases of neuropodia present on segments 13–18, and iv) thin median antennae. The two new species are distinct in both morphology and four gene sequences from the only two species previously known from Japan including Branchinotogluma japonicus (Miura & Hashimoto, 1991) and B. elytropapillata Zhang, Chen & Qiu, 2018, originally described from Kaikata Seamount vent on the Izu-Ogasawara Arc and Okinawa Trough, respectively

    DOI: 10.11646/zootaxa.5138.1.2

    Web of Science

  23. A new species of the Spirobranchus kraussii complex, S. akitsushima (Annelida, Polychaeta, Serpulidae), from the rocky intertidal zone of Japan Reviewed

    Eijiroh Nishi, Hirokazu Abe, Katsuhiko Tanaka, Naoto Jimi, Elena K. Kupriyanova

    ZooKeys   Vol. 1100 ( 1100 ) page: 1 - 28   2022.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Pensoft Publishers  

    A new species of Spirobranchus (Annelida: Serpulidae) is described based on specimens collected at the coastal Shonan area of Sagami Bay and the adjacent areas of Honshu, Japan. Spirobranchus akitsushimasp. nov. forms large aggregations in the intertidal rocky zone of warm-temperate Japanese shores. This species was referred to as Pomatoleios kraussii (Baird, 1864) until the monotypic genus Pomatoleios was synonymized with Spirobranchus. This new species is formally described based on morphologically distinct Japanese specimens with supporting DNA sequence data. The calcareous opercular endplate of Spirobranchus akitsushimasp. nov. lacks a distinct talon, but some specimens have a slight rounded swelling on the endplate underside, while in other species of the S. kraussii complex a talon is present, usually extended, and with bulges. We examined sub-fossil tube aggregations of the new species and suggest that such aggregation stranded ashore is a good indicator of vertical land movements (uplift and subsidence) resulting from past events, such as earthquakes, in Honshu, Japan.

    DOI: 10.3897/zookeys.1100.79569

    Web of Science

    Other Link: https://zookeys.pensoft.net/article/79569/download/xml/

  24. Five New Species of Flabelligera (Flabelligeridae: Annelida) from Japan Reviewed

    Naoto Jimi, Naohiro Hasegawa, Masanori Taru, Yuki Oya, Hisanori Kohtsuka, Shinji Tsuchida, Yoshihiro Fujiwara, Sau Pinn Woo

    Species Diversity   Vol. 27 ( 1 ) page: 101 - 111   2022.4

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japanese Society of Systematic Zoology  

    DOI: 10.12782/specdiv.27.101

  25. Taxonomy and distribution of deep benthos collected in and around the Southern Ocean during the 30th Anniversary expeditions of R/V Hakuho Maru: Annelida, Mollusca, Ostracoda, Decapoda, and Echinodermata Reviewed

    Akito Ogawa, Naoto Jimi, Shimpei F. Hiruta, Chong Chen, Itaru Kobayashi, Gregorius Altius Pratama, Hayate Tanaka, Masanori Okanishi, Hironori Komatsu, Minoru Ikehara

    Polar Science   Vol. 32   page: 100846 - 100846   2022.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.polar.2022.100846

    Web of Science

  26. 鳥羽市石鏡沿岸よりドレッジで採集された貝類

    河合秀高, 木村昭一, 佐藤達也, 自見直人

    かきつばた   ( 47 )   2022.4

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  27. Four new species of <i>Ctenodrilus</i>, <i>Raphidrilus</i>, and <i>Raricirrus</i> (Cirratuliformia, Annelida) in Japanese waters, with notes on their phylogenetic position Reviewed

    Naoto Jimi, Shinta Fujimoto, Yoshihiro Fujiwara, Kohei Oguchi, Toru Miura

    PeerJ   Vol. 10   page: e13044 - e13044   2022.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PeerJ  

    Four new species of annelids, <italic>Ctenodrilus japonicus</italic> sp. nov., <italic>Raphidrilus misakiensis</italic> sp. nov., <italic>Raphidrilus okinawaensis</italic> sp. nov., and <italic>Raricirrus anubis</italic> sp. nov., are described based on specimens collected from Japanese waters. <italic>Ctenodrilus japonicus</italic> sp. nov. inhabits the interstitial environment and can be distinguished from the other congeners by the following features: (<italic>i</italic>) total of 16 chaetigers, (<italic>ii</italic>) chaetigers 1–3 with stout hooks, (<italic>iii</italic>) minute body (approximately 1 mm in length), (<italic>iv</italic>) all parapodia with the same number of chaetae (two notochaetae; two neurochaetae), and (<italic>v</italic>) presence of dorsal and ventral papillae. <italic>Raphidrilus misakiensis</italic> sp. nov. lives under intertidal stones and can be distinguished from other congeners by having pectinate neurochaetae. <italic>Raphidrilus okinawaensis</italic> sp. nov. inhabits the interstitial environment and can be distinguished from other congeners by: (<italic>i</italic>) absence of annulation on the peristomium and achaetous segment and (<italic>ii</italic>) presence of a heart body in chaetigers 4–5. <italic>Raricirrus anubis</italic> sp. nov. inhabits whale bones and can be distinguished from other congeners by the following features: (<italic>i</italic>) presence of a heart body in chaetigers 9–14, (<italic>ii</italic>) presence of capillary neurochaetae on chaetiger 1, and (<italic>iii</italic>) presence of simple curved spines. A phylogenetic tree based on partial sequences of cytochrome <italic>c</italic> oxidase subunit I and 16S rRNA from the new species and other cirratulid worms showed that <italic>Raphidrilus</italic> is included in Cirratuliformia. This is the first record of <italic>Raphidrilus</italic> and <italic>Raricirrus</italic> from Japanese waters.

    DOI: 10.7717/peerj.13044

    Web of Science

    Other Link: https://peerj.com/articles/13044.xml

  28. First record of the decapod-egg predator Ovicides paralithodis (Nemertea, Carcinonemertidae) from the snow crab Chionoecetes opilio (Decapoda, Brachyura). International journal

    Natsumi Hookabe, Hirohito Motobayashi, Naoto Jimi, Hiroshi Kajihara, Rei Ueshima

    Parasitology international   Vol. 89   page: 102567 - 102567   2022.3

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    The carcinonemertid monostiliferan Ovicides paralithodis Kajihara and Kuris, 2013 was originally described as an egg predator of the red-king crab Paralithodes camtschaticus (Tilesius, 1815) in the Sea of Okhotsk, the Bering Sea, and the Gulf of Alaska. In the present study, several carcinonemertid specimens were obtained from the egg mass of the snow crab Chionoecetes opilio (O. Fabricius, 1788) in the Sea of Japan. Partial sequences of the mitochondrial cytochrome c oxidase subunit I gene (COI) determined from two specimens of the carcinonemertid were identical with a barcode sequence from the holotype of O. paralithodis, indicating that the host range of the species covers at least the two decapod species, P. camtschaticus and C. opilio.

    DOI: 10.1016/j.parint.2022.102567

    Web of Science

    PubMed

  29. Ramisyllis kingghidorahi n. sp., a new branching annelid from Japan Reviewed

    M. Teresa Aguado, Guillermo Ponz-Segrelles, Christopher J. Glasby, Rannyele P. Ribeiro, Mayuko Nakamura, Kohei Oguchi, Akihito Omori, Hisanori Kohtsuka, Christian Fischer, Yuji Ise, Naoto Jimi, Toru Miura

    Organisms Diversity & Evolution   Vol. 22 ( 2 ) page: 377 - 405   2022.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    <title>Abstract</title>Among over 20,000 species of Annelida, only two branching species with a highly modified body-pattern are known until now: the Syllidae <italic>Syllis ramosa</italic> McIntosh, 1879, and <italic>Ramisyllis multicaudata</italic> Glasby et al. (Zoological Journal of the Linnean Society, 164, 481–497, 2012). Both have unusual ramified bodies with one head and multiple branches and live inside the canals of host sponges. Using an integrative approach (combining morphology, internal anatomy, ecology, phylogeny, genetic divergence, and the complete mitochondrial genome), we describe a new branching species from Japan, <italic>Ramisyllis kingghidorahi</italic> n. sp., inhabiting an undescribed species of <italic>Petrosia</italic> (Porifera: Demospongiae) from shallow waters. We compare the new species with its closest relative, <italic>R. multicaudata</italic>; emend the diagnosis of <italic>Ramisyllis</italic>; and discuss previous reports of <italic>S. ramosa</italic>. This study suggests a much higher diversity of branching syllids than currently known. Finally, we discuss possible explanations for the feeding behaviour in the new species in relation to its highly ciliated wall of the digestive tubes (especially at the distal branches and anus), and provide a hypothesis for the evolution of branching body patterns as the result of an adaptation to the host sponge labyrinthic canal system.

    DOI: 10.1007/s13127-021-00538-4

    Web of Science

    Other Link: https://link.springer.com/article/10.1007/s13127-021-00538-4/fulltext.html

  30. Lacydonia shohoensis (Annelida, Lacydoniidae) sp. nov. – a new lacydonid species from deep-sea sunken wood discovered at the Nishi-Shichito Ridge, North-western Pacific Ocean Reviewed

    Natsumi Hookabe, Naoto Jimi, Hiroyuki Yokooka, Shinji Tsuchida, Yoshihiro Fujiwara

    Journal of the Marine Biological Association of the United Kingdom   Vol. 101 ( 6 ) page: 1 - 7   2022.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press (CUP)  

    <title>Abstract</title>
    <italic>Lacydonia</italic> Marion &amp; Bobretsky, 1875 is the sole genus in the family Lacydoniidae Bergström, 1914. We herein describe the new species of <italic>Lacydonia shohoensis</italic> sp. nov. from 2042-m deep bottoms at Shoho Seamount of the Nishi-Shichito Ridge, the Northwest Pacific Ocean. It is most similar to <italic>L. anapaulae</italic> Rizzo <italic>et al</italic>., 2016 in having a depression on the median anterior region and lacking lateral lobes on the posterior margin of prostomium whereas it is distinguished by possessing pygidium dorsally pigmented with three reddish spots and non-pigmented pygidial lateral cirri equally elongated.

    DOI: 10.1017/s0025315421000862

    Web of Science

  31. Violet bioluminescent Polycirrus sp. (Annelida: Terebelliformia) discovered in the shallow coastal waters of the Noto Peninsula in Japan Reviewed International journal

    Shusei Kanie, Daisuke Miura, Naoto Jimi, Taro Hayashi, Koji Nakamura, Masahiko Sakata, Katsunori Ogoh, Yoshihiro Ohmiya, Yasuo Mitani

    Scientific Reports   Vol. 11 ( 1 ) page: 19097 - 19097   2021.12

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    <title>Abstract</title>Terebellidae worms have large numbers of tentacles responsible for various biological functions. Some Terebellidae worms whose tentacles emit light are found around the world, including exceptional violet-light-emitting <italic>Polycirrus</italic> spp. found in Europe and North America. However, there is no video-recorded observation of the luminous behavior of such unique species in nature, and the genetic information related to their ecology are lacking. Here, for the first time, we video-recorded the violet-light-emitting behavior of an undescribed Japanese worm in its natural habitat. The worm was designated as <italic>Polycirrus</italic> sp. ISK based on morphological observations, and the luminescence spectrum showed a peak at 444 nm, which is an exceptionally short wavelength for bioluminescence in a shallow coastal water environment. An analysis of differentially expressing genes based on separate RNA-Seq analysis for the tentacles and the rest of body revealed the specific expression of genes that are probably involved in innate immunity in the tentacles exposed to predators. We also found a <italic>Renilla</italic> luciferase homologous gene, but coelenterazine was not detected in the worm extract by analyses using a liquid chromatography and a recombinant <italic>Renilla</italic> luciferase. These results will promote an understanding of the ecology and luminescence mechanisms of luminous <italic>Polycirrus</italic> spp.

    DOI: 10.1038/s41598-021-98105-6

    Web of Science

    PubMed

    Other Link: https://www.nature.com/articles/s41598-021-98105-6

  32. Sinking Down or Floating Up? Current State of Taxonomic Studies on Marine Invertebrates in Japan Inferred from the Number of New Species Published between the Years 2003 and 2020 Reviewed

    Hiroaki Nakano, Naoto Jimi, Takenori Sasaki, Hiroshi Kajihara

    Zoological Science   Vol. 39 ( 1 ) page: 7 - 15   2021.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Zoological Society of Japan  

    DOI: 10.2108/zs210076

    Web of Science

  33. The Phylogenetic Position of Branchamphinome (Annelida, Amphinomidae) with a Description of a New Species from the North Pacific Ocean Reviewed

    Naoto Jimi, Natsumi Hookabe, Kenichiro Tani, Ryuta Yoshida, Satoshi Imura

    Zoological Science   Vol. 39 ( 1 ) page: 99 - 105   2021.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Zoological Society of Japan  

    DOI: 10.2108/zs210051

    Web of Science

  34. Bioluminescence of the polychaete Tharyx sp. (Annelida: Cirratulidae) in deep-seawater from Toyama Bay, Japan Reviewed

    Ikuhiko Kin, Naoto Jimi, Gaku Mizuno, Hidenobu Koike, Yuichi Oba

    Plankton and Benthos Research   Vol. 16 ( 2 ) page: 145 - 148   2021.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Plankton Society of Japan/The Japanese Association of Benthology  

    DOI: 10.3800/pbr.16.145

  35. Vertical changes in abundance, biomass and community structure of pelagic polychaetes down to 1000 m depths at Station K2 in the western subarctic Pacific Ocean covering the four seasons and day–night Reviewed

    Kanako Amei, Ryo Dobashi, Naoto Jimi, Minoru Kitamura, Atsushi Yamaguchi

    Journal of Plankton Research   Vol. 43 ( 3 ) page: 442 - 457   2021.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    <title>Abstract</title>
    Pelagic polychaetes are distributed from the sea surface to greater depths of the oceans worldwide, but little information is available regarding their ecology. This study investigated the vertical distribution of abundance, biomass and community structure of pelagic polychaetes at a single station in the western subarctic Pacific based on day–night vertical stratified samples collected from a 0 to 1000 m water column during four seasons covering 1 year. The polychaete abundance and biomass ranged from 0 to 757 ind. 1000 m−3 and 0–6.1 mg WW m−3, respectively. Ten pelagic polychaete species belonging to nine genera and six families were identified. From cluster analysis based on abundance, the polychaete community was divided into five communities. Each community occurred at different depth layers. Two surface groups seen at 0–200 m were dominated by two carnivorous species: Tomopteris septentrionalis and Typhloscolex muelleri. The deepest group, dominated by the particle feeder Pelagobia longicirrata, was seen at 500–1000 m. Two transition groups occurred in the intermediate depths. These vertical distributions of the pelagic polychaete communities were common throughout the season and day. Water mass, food availability and the oxygen minimum layer are put forth as environmental factors that affect the pelagic polychaete community.

    DOI: 10.1093/plankt/fbab031

  36. First evidence of male dwarfism in scale worms: A new species of Polynoidae (Annelida) from hermit crab and molluscan shells Reviewed

    Naoto Jimi, Natsumi Hookabe, Takeya Moritaki, Taeko Kimura, Satoshi Imura

    Journal of Zoological Systematics and Evolutionary Research     2021.3

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1111/jzs.12463

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jzs.12463

  37. Annelids of the eastern Australian abyss collected by the 2017 RV ‘Investigator’ voyage Reviewed

    Laetitia M. Gunton, Elena K. Kupriyanova, Tom Alvestad, Lynda Avery, James A. Blake, Olga Biriukova, Markus Böggemann, Polina Borisova, Nataliya Budaeva, Ingo Burghardt, Maria Capa, Magdalena N. Georgieva, Christopher J. Glasby, Pan-Wen Hsueh, Pat Hutchings, Naoto Jimi, Jon A. Kongsrud, Joachim Langeneck, Karin Meißner, Anna Murray, Mark Nikolic, Hannelore Paxton, Dino Ramos, Anja Schulze, Robert Sobczyk, Charlotte Watson, Helena Wiklund, Robin S. Wilson, Anna Zhadan, Jinghuai Zhang

    ZooKeys   Vol. 1020   page: 1 - 198   2021.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Pensoft Publishers  

    In Australia, the deep-water (bathyal and abyssal) benthic invertebrate fauna is poorly known in comparison with that of shallow (subtidal and shelf) habitats. Benthic fauna from the deep eastern Australian margin was sampled systematically for the first time during 2017 RV ‘Investigator’ voyage ‘Sampling the Abyss’. Box core, Brenke sledge, and beam trawl samples were collected at one-degree intervals from Tasmania, 42°S, to southern Queensland, 24°S, from 900 to 4800 m depth. Annelids collected were identified by taxonomic experts on individual families around the world. A complete list of all identified species is presented, accompanied with brief morphological diagnoses, taxonomic remarks, and colour images. A total of more than 6000 annelid specimens consisting of 50 families (47 Polychaeta, one Echiura, two Sipuncula) and 214 species were recovered. Twenty-seven species were given valid names, 45 were assigned the qualifier cf., 87 the qualifier sp., and 55 species were considered new to science. Geographical ranges of 16 morphospecies extended along the eastern Australian margin to the Great Australian Bight, South Australia; however, these ranges need to be confirmed with genetic data. This work providing critical baseline biodiversity data on an important group of benthic invertebrates from a virtually unknown region of the world’s ocean will act as a springboard for future taxonomic and biogeographic studies in the area.

    DOI: 10.3897/zookeys.1020.57921

    PubMed

    Other Link: https://zookeys.pensoft.net/article/57921/download/xml/

  38. Black spicules from a new interstitial opheliid polychaete Thoracophelia minuta sp. nov. (Annelida: Opheliidae) Reviewed

    Naoto Jimi, Shinta Fujimoto, Mami Takehara, Satoshi Imura

    Scientific Reports   Vol. 11 ( 1 ) page: 1557   2021.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    <title>Abstract</title>The phylum Annelida exhibits high morphological diversity coupled with its extensive ecological diversity, and the process of its evolution has been an attractive research subject for many researchers. Its representatives are also extensively studied in fields of ecology and developmental biology and important in many other biology related disciplines. The study of biomineralisation is one of them. Some annelid groups are well known to form calcified tubes but other forms of biomineralisation are also known. Herein, we report a new interstitial annelid species with black spicules, <italic>Thoracophelia minuta</italic> sp. nov., from Yoichi, Hokkaido, Japan. Spicules are minute calcium carbonate inclusions found across the body and in this new species, numerous black rod-like inclusions of calcium-rich composition are distributed in the coelomic cavity. The new species can be distinguished from other known species of the genus by these conspicuous spicules, shape of branchiae and body formula. Further, the new species’ body size is apparently smaller than its congeners. Based on our molecular phylogenetic analysis using 18S and 28S sequences, we discuss the evolutionary significance of the new species’ spicules and also the species' progenetic origin.

    DOI: 10.1038/s41598-020-80702-6

    PubMed

    Other Link: http://www.nature.com/articles/s41598-020-80702-6

  39. A new nemertean with a branched proboscis, Gorgonorhynchus citrinus sp. nov. (Nemertea: Pilidiophora), with molecular systematics of the genus

    Natsumi Hookabe, Cong-Mei Xu, Aoi Tsuyuki, Naoto Jimi, Shi-Chun Sun, Hiroshi Kajihara

    Invertebrate Systematics     2021

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    Publishing type:Research paper (scientific journal)   Publisher:CSIRO Publishing  

    Among ~1300 species of world nemerteans, seven species in five genera of lineid heteronemerteans have been known to possess a branched proboscis. In this paper, we describe the eighth branched-proboscis species: Gorgonorhynchus citrinus sp. nov. from Okinawa, Japan. We also report Gorgonorhynchus cf. repens Dakin &amp;amp; Fordham, 1931 with uniformly orange body, as a new member for the Japanese nemertean fauna. We infer the phylogenetic relationships between these forms and other members of Lineidae McIntosh, 1874 for which partial sequences of the mitochondrial 16S rRNA and cytochrome c oxidase subunit I, and the nuclear 18S rRNA, 28S rRNA, and histone H3 genes are available in public databases, along with newly sequenced data of another branched-proboscis heteronemertean, Polydendrorhynchus zhanjiangensis (Yin &amp;amp; Zheng, 1984) from China. In the resulting tree, Gorgonorhychus Dakin &amp;amp; Fordham, 1931 was sister group to non-branched-proboscis Dushia Corrêa, 1963, whereas P. zhanjiangensis was sister group to likewise non-branched-proboscis Cerebratulus lacteus (Leidy, 1851).
    http://zoobank.org/urn:lsid:zoobank.org:pub:685992C5-F595-4C28-9178-256D945E595A

    DOI: 10.1071/is20057

  40. A new interstitial genus and species of Acrocirridae from Okinawa-jima Island, Japan Reviewed

    NAOTO JIMI, SHINTA FUJIMOTO, SATOSHI IMURA

    Zoosymposia   Vol. 19 ( 1 ) page: 164 - 172   2020.12

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Magnolia Press  

    A new interstitial acrocirrid, Actaedrilus yanbarensis gen et. sp. nov., is described from Okinawa-jima Island, Japan. Individuals of the new genus and species were collected from the interstices of subtidal coarse sand (about 1 m depth). The new genus is comprised of the new species and A. polyonyx (Eliason, 1962) comb. nov. and it is characterized by the presence of two pairs of long branchiae, non-retractile head, minute body, and short club-shaped palps. We infer the phylogenetic position of A. yanbarensis gen. et sp. nov. within Acrocirridae using five gene markers (COI, 16S, 18S, 28S, Cyt B).

    DOI: 10.11646/zoosymposia.19.1.17

  41. Community structure and seasonal changes in population structure of pelagic polychaetes collected by sediment traps moored in the subarctic and subtropical western North Pacific Ocean Reviewed

    KANAKO AMEI, NAOTO JIMI, MINORU KITAMURA, NAOYA YOKOI, ATSUSHI YAMAGUCHI

    Zoosymposia   Vol. 19 ( 1 ) page: 41 - 50   2020.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Magnolia Press  

    Community structure and seasonal changes in the population structure of pelagic polychaetes were studied based on zooplankton samples collected by sediment traps moored at 200 m depth in the subarctic and subtropical western North Pacific throughout the year. Eight species belonging to seven genera and seven families occurred at the subarctic station, while twelve species belonging to ten genera and seven families were identified at the subtropical station. Polychaete abundance was 5.37 ± 0.44 ind. m-2 day-1 (annual mean ± standard error) at the subarctic station, and 1.36 ± 0.15 ind. m-2 day-1 at the subtropical station. Polychaete abundance at the subarctic station was high from May to August, but no seasonal patterns were observed at the subtropical station. The dominant species in the subarctic was Tomopteris septentrionalis, which accounted for 62.9% of annual mean abundance; at the subtropical station, the dominant species was Pelagobia sp. (22.8%). In the subarctic, small specimens of T. septentrionalis (&lt;3 mm in body length) occurred only in winter (December-March). No clear seasonal changes in population structure of the subtropical Pelagobia sp. were detected. The latitudinal patterns we observed in the polychaete communities of the western North Pacific were similar to those previously observed in the eastern North Pacific. Changes in the population structure of T. septentrionalis suggest that the life cycle of this species is seasonal in the subarctic region.

    DOI: 10.11646/zoosymposia.19.1.9

  42. Description of Pericelis flavomarginata sp. nov. (Polycladida: Cotylea) and its predatory behavior on a scaleworm Reviewed

    AOI TSUYUKI, YUKI OYA, NAOTO JIMI, HIROSHI KAJIHARA

    Zootaxa   Vol. 4894 ( 3 ) page: 403 - 412   2020.12

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    Publishing type:Research paper (scientific journal)   Publisher:Magnolia Press  

    We describe a new species of polyclad flatworm, Pericelis flavomarginata sp. nov., from the intertidal and subtidal zones along localities on the Pacific coast of Japan. Pericelis flavomarginata sp. nov. is characterized by i) the dorsal surface of the body fringed by a lemon-yellow line except for the tip of tentacles, with a narrow brown midline running from the anterior edge of the body to the posterior end of the pharynx, ii) the pair of marginal tentacles with the tips extending and tapering, and iii) the presence of a common gonopore. Our molecular phylogenetic analysis revealed that selected Pericelis species were divided into two clades, each of which may be agreed with a characteristic dorsal color pattern. Additionally, we report an observation on the feeding behavior of P. flavomarginata sp. nov. on the polychaete Iphione muricata (Savigny in Lamarck, 1818).

    DOI: 10.11646/zootaxa.4894.3.6

  43. Widening the host range of the ectosymbiotic scale-worm <i>Asterophilia culcitae</i> (Annelida: Polynoidae) to three echinoderm classes, with data on its body color variation Reviewed

    Takahiro Sugiyama, Naoto Jimi, Ryutaro Goto

    Plankton and Benthos Research   Vol. 15 ( 4 ) page: 289 - 295   2020.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Plankton Society of Japan/The Japanese Association of Benthology  

    DOI: 10.3800/pbr.15.289

  44. <i>Lamispina miurai</i> sp. nov. (Annelida: Flabelligeridae) from off Aomori, Japan Reviewed

    Yuki Higashida, Naoto Jimi, Hiroshi Kajihara

    Species Diversity   Vol. 25 ( 2 ) page: 329 - 342   2020.11

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japanese Society of Systematic Zoology  

    <p>A new species of flabelligerid polychaete, <i>Lamispina miurai</i> sp. nov., has been described based on material collected at a depth of 226–228 m in the Pacific Ocean, off Aomori, Japan. <i>Lamispina miurai</i> sp. nov. can be differentiated from other congeners by the following features: <i>i</i>) the body is not covered with sand or large sediment particles; <i>ii</i>) the lamispines are present on the chaetiger 4 and succeeding chaetigers; <i>iii</i>) the tip of the lamispine is curved and subdistally serrated; <i>iv</i>) the cephalic cage is formed by chaetigers 1–3; and <i>v</i>) the length of the cephalic cage is twice as long as the body width.</p>

    DOI: 10.12782/specdiv.25.329

  45. Two new species of Fauveliopsidae (Annelida, Sedentaria) from submarine caves and deep sea, Japan Reviewed

    NAOTO JIMI, SHINTA FUJIMOTO, AKITO OGAWA, YOSHIHISA FUJITA, YUYA SHIGENOBU, SATOSHI IMURA

    Zootaxa   Vol. 4878 ( 2 ) page: 385 - 391   2020.11

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Magnolia Press  

    Two new species of fauveliopsid annelids, Fauveliopsis antri sp. nov. and Laubieriopsis soyoae sp. nov., are described based on specimens collected from Japanese waters. Fauveliopsis antri sp. nov. inhabits submarine caves and can be discriminated from the other congeners by the following features: i) 32 chaetigers, ii) chaetigers 1–3 with stout hooks, iii) minute body (about 1 mm in length), iv) all parapodia with same number of chaetae (2 notochaetae; 2 neurochaetae), and v) presence of dorsal and ventral papillae. Laubieriopsis soyoae sp. nov. inhabits deep water sediments and can be distinguished from the other congeners by: i) 24 chaetigers, ii) chaetigers 1–3 without annulations, and iii) acicular chaetae with tips entire, without denticles.

    DOI: 10.11646/zootaxa.4878.2.11

    Web of Science

  46. Meiobenthic Polychaete <i>Dinophilus</i> sp. cf. <i>gyrociliatus</i> (Annelida: Dinophilidae) from Japan with SEM Observation and DNA Barcodes

    Naoto Jimi, Takuya Minokawa, Toru Miura, Hiroshi Kajihara

    Species Diversity   Vol. 25 ( 2 ) page: 213 - 218   2020.9

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    Publishing type:Research paper (scientific journal)   Publisher:Japanese Society of Systematic Zoology  

    DOI: 10.12782/specdiv.25.213

  47. Symbiotic animals of echinoderms Invited

    Naoto Jimi, Tsuyoshi Takano, Yoshihisa Fujita, Kazuya Nagasawa

    Aquabiology   Vol. 249   page: 356 - 361   2020.8

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Part of collection (book)  

  48. Alien worm in worm: a new genus of endoparasitic polychaete (Phyllodocidae, Annelida) from scale worms (Aphroditidae and Polynoidae, Annelida) Reviewed

    Naoto Jimi, Taeko Kimura, Akito Ogawa, Hiroshi Kajihara

    Systematics and Biodiversity   Vol. 19 ( 1 ) page: 1 - 9   2020.7

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    Publishing type:Research paper (scientific journal)   Publisher:Informa UK Limited  

    DOI: 10.1080/14772000.2020.1785038

  49. Lacydoniidae (Annelida) Off the Coast of North-eastern Japan: A Description of Lacydonia japonica sp. nov. Reviewed International journal

    Natsumi Hookabe, Naoto Jimi, Shinji Tsuchida, Yoshihiro Fujiwara, Hiroshi Kajihara

    Zoological Studies   Vol. 59   page: 28 - 28   2020.5

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    Lacydonia japonica sp. nov. (Annelida, Lacydoniidae) is described based on material found in sediments collected off the Pacific coast of northern Honshu, Japan, at depths of 262 m and 407 m. The sediments were obtained by a remotely operated vehicle equipped with a suction sampler during a Tohoku Ecosystem-Associated Marine Sciences (TEAMS) project in 2019. Lacydonia japonica sp. nov. belongs to the eyeless group of lacydoniids and is discriminated from the morphologically most similar congener, Lacydonia papillata Uschakov, 1958 by its reddish pigments on both the dorsal and ventral parapodial cirri and four pigment spots on the pygidium. To assess the phylogenetic position of the new species among other lacydoniids for which sequence data are available in public databases, analyses were performed using the mitochondrial cytochrome c oxidase subunit I (COI) and 16S rRNA, as well as the nuclear 18S rRNA and 28S rRNA genes. We additionally obtained some lacydoniids by sledging off western Japan, but these were severely fragmented and broken during collection. Using the paucity of morphological data, they were left unidentified as Lacydonia sp. but included in the molecular analyses. Genetic distances between Lacydonia eliasoni Hartmann-Schröder, 1996, Lacydonia japonica, and Lacydonia sp. off western Japan were 10.4-17.1% uncorrected p-distance (11.3-18.6% K2P) in terms of 658-bp COI sequences.

    DOI: 10.6620/ZS.2020.59-28

    PubMed

  50. A new marine tardigrade genus and species (Arthrotardigrada, Styraconyxidae) with unique pockets on the legs Reviewed

    Fujimoto S, Jimi N

    Zoosystematics and Evolution   Vol. 96 ( 1 ) page: 115 - 122   2020.3

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  51. A new deep-sea species of Flabelligena from off the South Orkney.Islands, the Southern Ocean Reviewed

    Jimi, N, Ogawa, A, Hiruta, H.F, Ikehara, M, Imura, S

    Biodiversity Data Journal   Vol. 8   2020

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    Background A new acrocirrid species, Flabelligena hakuhoae sp. nov., is described from off the South Orkney Islands, the Southern Ocean. Individuals of the new species were collected by rock dredging, 2036-2479 m in depth. New information The new species can be distinguished from its congeners by the number of branchiae, position and length of paired ventral large papillae and length of body papillae.

    DOI: 10.3897/BDJ.8.E53312

    Scopus

  52. First records of Brada kudenovi Salazar-Vallejo, 2017 (Annelida, Flabelligeridae) from Japan. Reviewed

    Jimi, N., Imura, S.

    Check List   Vol. 16 ( 1 ) page: 207 - 210   2020

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  53. Morphological and genetic confirmation of extensive distribution of a pelagic polychaete Poeobius meseres Heath, 1930 (Annelida Flabelligeridae) Reviewed

    Jimi, N, Yamaguchi, A, Fujiwara, Y

    Biodiversity Journal   Vol. 10 ( 4 ) page: 325 - 328   2019.12

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    DOI: 10.31396/Biodiv.Jour.2019.10.4.325.328

  54. A new species of Polyodontes (Annelida: Acoetidae) from Japan Reviewed

    Naoto Jimi, Shinri Tomioka, Ryo Orita, Hiroshi Kajihara

    Species Diversity   Vol. 24   page: 275 - 279   2019.11

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  55. Benthic deep-sea fauna in south of the Kii Strait and the Sea of Kumano, Japan. Second report

    Kimura Taeko, Kimura Shoichi, Kakui Keiichi, Hookabe Natsumi, Kuramochi Toshiaki, Fujita Toshihiko, Ogawa Akito, Kobayashi Itaru, Jimi Naoto, Okanishi Masanori, Yamaguchi Haruka, Hirose Masato, Yoshikawa Akihiro, Fukuchi Jun, Shimomura Michitaka, Kashio Sho, Uyeno Daisuke, Fujiwara Kyoji, Naruse Tohru, Kushida Yuka, Kise Hiroki, Maekawa Yoichi, Nakamura Toru, Okumura Junya, Tanaka Kazuki

    Annals of Field Research and Technology Mie University   Vol. 17 ( 17 ) page: 1 - 29   2019.11

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    Preliminary results of the deep-sea faunal survey conducted from the TR/V Seisui-maru of Mie University in April 2019 are presented. A total of 20 taxonomists and ecologists working on a wide variety of animal taxa participated in this survey. Surveyed areas included the Kumano Sea(off Mie Prefecture)and south of the Kii Strait(off Tanabe Bay, Wakayama Prefecture), at depths of 112-775 m. Sampling gears employed were beam trawl and biological dredge. The collection is represented by macrobenthos and meiobenthos from nine animal phyla, including echinoderms, arthropods, molluscans and annelids. The number of phyla occurring in each station varied from seven to eight. The station with most diverse fauna at the phylum level was St. 3B(south of the Kii Strait, 775-661 m depth, mud bottom).Meiofauna includes priapulids, nematodes and small arthropods such as copepods, tanaidaceans, amphipods, isopods and cumaceans. In addition to freeliving species, cnidarians symbiotic on a gastropod and an antipatharian, and crustaceans parasitic on a fi sh and sea urchins were also collected. Preliminary identifi cations are given for Asteroidea, Ophiuroidea, Holothuroidea, Crinoidea, Cyclopoida, Siphonostomatoida, Tanaidacea, Isopoda, Decapoda, Mollusca, polychaetes, Bryozoa, Cnidaria and Nemertea.

    CiNii Books

  56. Life in the city: a new scavenger species of Ophryotrocha (Annelida, Dorvilleidae) from Odaiba, Tokyo, Japan Reviewed

    Naoto Jimi, Masanori Taru, Satoshi Imura

    Proceedings of the Biological Society of Washington   Vol. 132   page: 131 - 140   2019.11

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  57. Life cycle of the Japanese green syllid, Megasyllis nipponica (Annelida: Syllidae): field collection and establishment of rearing system Reviewed

    Toru Miura, Kohei Oguchi, Mayuko Nakamura, Naoto Jimi, Sakiko Miura, Yoshinobu Hayashi, Shigeyuki Koshikawa, M. Teresa Aguado

    Zoological Science   Vol. 36 ( 5 ) page: 372 - 379   2019.10

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    Some polychaete species in the family Syllidae exhibit distinctive life cycles, in which a posterior part of the body of an individual detaches as a reproductive individual called a "stolon". This type of reproductive mode is known as stolonization or schizogamy. Although a number of observations have been reported, and techniques using molecular markers have recently been applied to characterize this phenomenon, little is known about the developmental and physiological mechanisms underlying stolonization. In the present study, Megasyllis nipponica, a common syllid species distributed throughout Japan, is proposed as a model to reveal the developmental and physiological mechanism of stolonization, and the rearing system to maintain it in laboratory conditions is described. This species was repeatedly sampled around Hokkaido, where more dense populations were found from August to October. The animals were maintained in the laboratory under stable long-day condition (20°C, 16L:8D), and fed mainly with spinach powder. Stolonization processes, spawning, embryonic and postembryonic development were observed and documented, and the required period of time for each developmental stage was recorded. The complete generation time was around two months under the rearing condition. The information provided is valuable to maintain this and other syllid species in the laboratory, and hence contributes to the establishment of new evolutionary and developmental research lines in this group of annelids.

    DOI: 10.2108/zs190058

    PubMed

  58. Benthic deep-sea fauna in south of the Kii Strait and the Sea of Kumano, Japan Reviewed

      Vol. 45   page: 11 - 50   2019.9

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    CiNii Books

    Other Link: https://agriknowledge.affrc.go.jp/RN/2030931241

  59. Bioluminescence properties of Thelepus japonicus (Annelida: Terebelliformia). Reviewed International journal

    Ikuhiko Kin, Naoto Jimi, Yuichi Oba

    Luminescence : the journal of biological and chemical luminescence   Vol. 34 ( 6 ) page: 602 - 606   2019.9

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    Terebelliformia is a benthic group of marine annelid worms. The bioluminescence of several species has been reported in taxonomical and histological literature, but very little information is known about the biochemical aspects of this phenomenon. In this study, we examined the basic properties of the luminescence system using an extract of the Japanese terebelliform worm, Thelepus japonicus. The bioluminescence extract was soluble in water, and emitted blue-green light at λmax 508 nm following the addition of divalent cations. This triggering action was highly specific to Fe2+ and addition of ATP, H2 O2 or coelenterazine did not enhance activity. The bioluminescence was inactivated by heat treatment and organic solvents, indicating the involvement of a protein component. These results suggested that Thelepus worm produces light using a novel system that differs from that in other known luminescent annelids.

    DOI: 10.1002/bio.3643

    PubMed

  60. New record of the hydrothermal-vent-endemic polychaete Archinome jasoni Borda et al., 2013 (Annelida, Amphinomidae) from the northwestern Pacific Reviewed

    Naoto Jimi, Chong Chen, Hiroshi Kajihara

    Check List   Vol. 15   page: 523 - 526   2019.7

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  61. New species of bone-eating worm Osedax from the abyssal South Atlantic Ocean (Annelida, Siboglinidae) Reviewed International journal

    Yoshihiro Fujiwara, Naoto Jimi, Paulo Y.G. Sumida, Masaru Kawato, Hiroshi Kitazato

    ZooKeys   Vol. 814 ( 814 ) page: 53 - 69   2019.1

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    A new species of bone-eating annelid, Osedaxbraziliensis sp. n., found in a sunken whale carcass at a depth of 4,204 m at the base of the São Paulo Ridge in the South Atlantic Ocean off the Brazilian coast is described. The organism was retrieved using the human-occupied vehicle Shinkai 6500 during the QUELLE 2013 expedition. This is the 26th species of the genus and the first discovery from the South Atlantic Ocean, representing the deepest record of Osedax worldwide to date. This species morphologically resembles Osedaxfrankpressi but is distinguished by the presence of a yellow bump or patch behind the prostomium and its trunk length. Molecular phylogenetic analysis using three genetic markers (COI, 16S, and 18S) showed that O.braziliensis sp. n. is distinct from all other Osedax worms reported and is a sister species of O.frankpressi.

    DOI: 10.3897/zookeys.814.28869

    PubMed

  62. Polychaete meets octopus: symbiotic relationship between Spathochaeta octopodis gen. et sp. nov. (Annelida: Chrysopetalidae) and Octopus sp. (Mollusca: Octopodidae) Reviewed

    Naoto Jimi, Takeya Moritaki, Hiroshi Kajihara

    Systematics and Biodiversity   Vol. online first   2019.1

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  63. Benthic deep-sea fauna in the Sea of Kumano, Mie Prefecture, Japan

    Kimura Taeko, Kimura Shoichi, Jimi Naoto, Kakui Keiichi, Tomioka Shinri, Oya Yuki, Matsumoto Yu, Tanabe Yuki, Hasegawa Naohiro, Hookabe Natsumi, Homma Riko, Hosoda Yushi, Fujimoto Shinta, Kuramochi Toshiaki, Fujita Toshihiko, Ogawa Akito, Kobayashi Itaru, Ishida Yoshiaki, Tanaka Hayate, Onishi Haruka, Shimetsugu Miho, Yoshikawa Akihiro, Tanaka Masaatsu, Kushida Yuka, Maekawa Yoichi, Nakamura Toru, Okumura Junya, Tanaka Kazuki

    Annals of Field Research and Technology Mie University   Vol. 16 ( 16 ) page: 1 - 32   2018.10

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    In this study, we had investigated the benthic deep-sea fauna using the dredge and beam trawl in the region from the continental shelf to the continental slope of the Sea of Kumano, Mie Prefecture, during the No.1722 research voyage of the training ship Seisui-Maru of Mie University. The survey was carried out at 16 stations covering a depth range of 113-1059 m. The results of the survey, 14 phyla had been confirmed. Arthropod, echinoderm, annelid and molluscan macrobenthos were collected from all of the stations. The phylum number of each station was in the range from 4 to 11. The largest number of phyla had been confi rmed at St.10D of boulders bottom(768-800 m depth). Meiobenthos confi rmed in our sample were kinorhynchs, nematodes, tardigrades, loriciferans and small arthropods such as tanaidaceans, copepods and cumaceans. In addition to free-living species, parasitic copepods, isopods, platyhelminthes, acanthocephalans and nematodes had been found in fish, crustaceans and polychaetes.

    CiNii Books

  64. New annelid species from the deepest known whale-fall environment: Bathykermadeca thanatos sp. nov. (Annelida: Polynoidae) Reviewed International journal

    Naoto Jimi, Yoshihiro Fujiwara, Hiroshi Kajihara

    Zootaxa   Vol. 4450 ( 5 ) page: 575 - 580   2018.7

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    A new species of polynoid annelids, Bathykermadeca thanatos sp. nov., is described based on specimens collected from sunken whale bones in the Nansei-Shoto Trench in the Philippine Sea at a depth of 4974 m. The cetacean-carcass community at the site exceeds the deepest record reported to date. This new species can be distinguished from other members of the genus by the following features: i) there is only one type of neurochaetae, ii) the teeth lack serration and grow inwardly, iii) median antenna extends beyond the tip of frontal filament, iv) nephridial papillae are present in segments 12-15, and v) there are about 50 notochaetae in each parapodium.

    DOI: 10.11646/zootaxa.4450.5.4

    PubMed

  65. Polychaetes collected from floats of oyster-farming rafts in Kure, the Seto Inland Sea, Japan, with notes on the pest species Polydora hoplura (Annelida: Spionidae) Reviewed

    Naoto Jimi, Noriko Yasuoka, Hiroshi Kajihara

    Bulletin of Kitakyushu Museum of Natural History and Human History Series A (Natural History)   Vol. 16   page: 1 - 4   2018.3

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  66. A new species of the rare, deep-sea polychaete genus Benthoscolex from the Sea of Kumano, Japan (Annelida, Amphinomidae) Reviewed

    Naoto Jimi, Taeko Kimura, Akito Ogawa, Hiroshi Kajihara

    ZooKeys   Vol. 2018 ( 738 ) page: 81 - 88   2018

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    A new species of amphinomid polychaete, Benthoscolex seisuiae sp. n., is described from the Sea of Kumano, Japan, from depths of 487–596 m. The species is distinguishable from its congeners by the following features: i) palps 1.8 times as long as lateral antennae
    ii) branchiae do not reach to the tip of the notochaetae. This is the first record of Benthoscolex from Japan. A partial mitochondrial cytochrome c oxidase subunit I gene sequence from the holotype of B. seisuiae sp. n. is provided for reliable species identification in the future.

    DOI: 10.3897/zookeys.738.22927

    Scopus

  67. Description of Elisesione imajimai sp. Nov. from Japan (Annelida: Hesionidae) and a redescription of E. problematica (wesenberg-lund, 1950) and its confirmation within hesionini Reviewed

    Naoto Jimi, Danny Eibye-Jacobsen, Sergio I. Salazar-Vallejo

    Zoological Studies   Vol. 57   page: 8   2018

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Academia Sinica  

    Elisesione imajimai sp. nov. is newly described based on specimens collected in Sagami Bay, Japan, at a depth of 150-250 m. This new species resembles E. problematica (Wesenberg-Lund, 1950) from Iceland, but differs because in E. imajimai sp. nov. the ventral cirri surpass the tips of the neurochaetal lobes, reaching to the medial part of the neurochaetal bundle
    the palps are 1/2 – 4/5 as long as the antennae
    the aciculae are pale brownish
    and the dorsal integument shows 9-10 transverse wrinkles per segment, whereas in E. problematica the ventral cirri hardly reach the tips of the neurochaetal lobes
    the palps are as long as the antennae
    the aciculae are black
    and there are 15 transverse wrinkles per segment. A morphological redescription of E. problematica based on its type material and a revised key to identify species in the genus are also provided. A phylogenetic analysis based upon four genes (COI, 16S, 18S, 28S) confirms its position within Hesionini.

    DOI: 10.6620/ZS.2018.57-08

    Scopus

  68. A new species, Lamispina ammophila sp. nov. (annelida: Flabelligeridae), from Shimoda, Japan Reviewed

    Naoto Jimi, Hiroshi Kajihara

    Species Diversity   Vol. 23 ( 1 ) page: 39 - 42   2018

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    A new species of flabelligerid polychaete, Lamispina ammophila sp. nov., is described from offthe coast of Shimoda, Japan. The species can be discriminated from the other congeners by the following features: i) dorsal region of body being adhered to by sediment particles, ii) lamispines without accessory tooth, present from chaetiger 4 and succeeding chaetigers, and iii) cephalic cage 1.5-2.0 times as long as body width. A partial mitochondrial cytochrome c oxidase subunit I (COI) gene sequence from the paratype is provided as a DNA barcode for the new species.

    DOI: 10.12782/specdiv.23.39

    Scopus

  69. Leocratides (Annelida: Hesionidae) from the Pacific Coast of Middle Honshu, Japan, with a description of Leocratides kimuraorum sp. nov. Reviewed

    Naoto Jimi, Masaatsu Tanaka, Hiroshi Kajihara

    Species Diversity   Vol. 22 ( 2 ) page: 133 - 141   2017.12

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    A new species of hesionid polychaetes, Leocratides kimuraorum sp. nov., is described based on material collected from the Shima Peninsula and Sagami Bay (middle Honshu, Japan), as well as museum specimens collected from Sagami Bay, Suruga Bay, and Shirahama. Leocratides kimuraorum sp. nov. is the third species in this genus and can be discriminated from the two congeners, L. filamentosus Ehlers, 1908 and L. ehlersi (Horst, 1921), by i) the length of the antennae, which are as long as palps, ii) the presence of pharyngeal terminal papillae, and iii) the absence of a papillose peristomial membrane. On the other hand, L. filamentosus, originally described from offWestern Sumatra, Indonesia, was also collected from Sagami Bay, and represents a new record of this species for Japanese waters. Partial mitochondrial cytochrome c oxidase subunit I gene sequences from the holotype of L. kimuraorum sp. nov. and newly collected specimen of L. filamentosus are provided for reliable species identification in the future.

    DOI: 10.12782/specdiv.22.133

    Scopus

  70. Rare endoparasitic Asteriomyzostomum (Annelida: Asteriomyzostomidae) from Japan, including three new species descriptions and their phylogenetic position within Myzostomida Reviewed

    Naoto Jimi, Takeya Moritaki, Hiroshi Kajihara

    Parasitology International   Vol. 66 ( 6 ) page: 841 - 847   2017.12

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    DOI: 10.1016/j.parint.2017.08.001

    Web of Science

    PubMed

  71. Remarkable biodiversity of flabelligerids in Japan: seven new species of Diplocirrus (Annelida: Flabelligeridae) from Japanese waters Reviewed

    Naoto Jimi, Yoshihiro Fujiwara, Hiroshi Kajihara

    ZOOTAXA   Vol. 4337 ( 3 ) page: 344 - 360   2017.10

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    Seven new species of Diplocirrus are described from Japan: D. asamushiensis sp. nov., D. imajimai sp. nov., D. mamoi sp. nov., D. ohtsukai sp. nov., D. seisuiae sp. nov., D. tohokuensis sp. nov., and D. toyoshioae sp. nov. These species are distinguished from all the known species of Diplocirrus by the following features: length of the cephalic cage, length of lateral papillae, presence of gonopodial lobe, adhering pattern of sediment particles, length of caruncle, length and morphological feature of branchiae, articles and morphological features of neurochaetae, and swollen area along the body.

    DOI: 10.11646/zootaxa.4337.3.2

    Web of Science

  72. A new species and the shallowest record of Flabegraviera Salazar-Vallejo, 2012 (Annelida: Flabelligeridae) from Antarctica Reviewed

    Naoto Jimi, Megumu Tsujimoto, Kentaro Watanabe, Keiichi Kakui, Hiroshi Kajihara

    ZOOTAXA   Vol. 4221 ( 4 ) page: 477 - 485   2017.1

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    A new species of polychaete, Flabegraviera fujiae sp. nov., is described and the first report of F. mundata (Gravier, 1906) from the shallow water around Syowa Station, Antarctica, is presented. Flabegraviera fujiae sp. nov. resembles F. profunda Salazar-Vallejo, 2012 but is discriminated from the latter by having eyes and an exposed cephalic cage. The specimen of F. mundata was collected from a depth of 8 m, providing the shallowest record of this species to date.

    DOI: 10.11646/zootaxa.4221.4.4

    Web of Science

    PubMed

  73. Designation of a neotype and redescription of Hesione reticulata von Marenzeller, 1879 from Japan (Annelida, Hesionidae) Reviewed

    Naoto Jimi, Sergio I. Salazar-Vallejo, Hiroshi Kajihara

    ZOOKEYS   ( 657 ) page: 29 - 41   2017

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    The hesionid polychaete Hesione reticulata von Marenzeller, 1879 was described from Enoshima Island, Japan and has been recorded also from the Red Sea. Depending on researchers, it has been regarded as either a distinct species or synonymous with older established ones. The type specimen has been lost. In order to clarify its taxonomic status, H. reticulata is herein redescribed, illustrated, and a neotype is proposed based on recent material collected near the type locality. The diagnostic features include the presence of several dorsal, discontinuous longitudinal bands, interrupted by pale segmental spots; prostomium with tiny antennae; a tuberculated dorsal integument; acicular lobes double; and neurochaetal blades with guards approaching the distal tooth. The dorsal color pattern in life enables a clear distinction from similar species such as H. intertexta Grube, 1878 amongst others. Mitochondrial COI barcoding sequences are deposited in the DNA Data Bank of Japan. A key to Hesione species from Japan is also included.

    DOI: 10.3897/zookeys.657.11064

    Web of Science

    PubMed

  74. Marine benthic community in Shirahama, southwestern Kii Peninsula, central Japan Reviewed

    Masanori Okanishi, Asuka Sentoku, Shinta Fujimoto, Naoto Jimi, Ryou Nakayama, Yusuke Yamana, Hiroki Yamauchi, Hayate Tanaka, Tetsuya Kato, Sho Kashio, Daisuke Uyeno, Kohki Yamamoto, Katsumi, Miyazaki, Akira Asakura

    Publications of the Seto Marine Biological Laboratory   Vol. 44   page: 7 - 52   2016.12

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    DOI: 10.5134/217458

    CiNii Books

  75. New species of Trophoniella from Shimoda, Japan (Annelida, Flabelligeridae) Reviewed

    Naoto Jimi, Yoshihiro Fujiwara

    ZooKeys   Vol. 614 ( 614 ) page: 1 - 13   2016.9

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    Trophoniella hephaistos sp. n. was collected from a tank irrigated with seawater pumped directly from Nabeta Bay, Japan. This species is discriminated from other Trophoniella by having dorsal tubercles, a tongue-shaped branchial plate, a tunic covered with large sediment grains dorsally and ventrally, having eyes, and anchylosed neurohooks starting from chaetigers 17-20. This is the first record of Trophoniella from Japanese waters. Identification keys to species of Trophoniella and four gene sequences (COI, 16S, 18S, 28S) of this species are provided. Phylogenetic analysis was conducted to clarify phylogenetic position of Trophoniella in Flabelligeridae using four genes.

    DOI: 10.3897/zookeys.614.8346

    Web of Science

    PubMed

  76. 日本産ミズヒキゴカイ科・ハボウキゴカイ科の分類の現状 Invited

    Naoto Jimi

      Vol. 57 ( 57 ) page: 69 - 72   2016.6

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    CiNii Books

  77. Marine invertebrates associated with the sea pen Cavernulina sp. (Octocorallia: Pennatulacea: Veretillidae) in the Oshima Strait, Amami Island, southern Japan

    Naoto Jimi

    Nature of Kagoshima   Vol. 42   page: 487 - 491   2016.5

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  78. Reproductive swarming of Polyophthalmus pictus (Annelida: Opheliidae) observed at Okinawa Island and adjacent island, Ryukyu Islands, southern Japan. Reviewed

    Naoto Jimi, Yoshihiro Fujiwara

    Fauna Ryukyuana   Vol. 28   page: 29 - 35   2016.2

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  79. Diplocirrus nicolaji (Annelida: Flabelligeridae) from Japan, detailed morphological observation and DNA barcoding Reviewed

    Naoto Jimi, Masaatsu Tanaka, Yoshihiro Fujiwara

    Marine Biodiversity Records   Vol. 9 ( 1 ) page: 1 - 8   2016

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press  

    Diplocirrus nicolaji is a flabelligerid worm originally described from shallow waters of Peter the Great Bay, Sea of Japan. Later, this species was also recorded from Japan, but detailed data were not provided
    thus the occurrence of D. nicolaji in Japan needs to be confirmed based upon additional material. The collection of 20 D. nicolaji individuals from four localities along Japanese coasts (the Sea of Japan and western Pacific Ocean), allowed us to provide detailed morphological observations using stereoscopic and scanning electron microscopy. Partial cytochrome c oxidase subunit I sequences were obtained for phylogenetic analysis. Although the morphological analysis detected a few variations in palp length and body colour in ethanol among the local populations, the phylogenetic analysis confirmed their conspecificity with little genetic divergence. This is the first report of D. nicolaji from the western Pacific Ocean and extends its distribution southward.

    DOI: 10.1186/s41200-016-0024-7

    Scopus

  80. JAMBIO Coastal Organism Joint Surveys reveals undiscovered biodiversity around Sagami Bay Reviewed

    Hiroaki Nakano, Keiichi Kakui, Hiroshi Kajihara, Michitaka Shimomura, Naoto Jimi, Shinri Tomioka, Hayate Tanaka, Hiroshi Yamasaki, Masaatsu Tanaka, Takato Izumi, Masanori Okanishi, Yutaro Yamada, Hideo Shinagawa, Toshihiko Sato, Yasutaka Tsuchiya, Akihito Omori, Mamoru Sekifuji, Hisanori Kohtsuka

    REGIONAL STUDIES IN MARINE SCIENCE   Vol. 2   page: 77 - 81   2015.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    JAMBIO, Japanese Association for Marine Biology, has been organizing JAMBIO Coastal Organism Joint Surveys at Shimoda Marine Research Center, University of Tsukuba, and Misaki Marine Biological Station, the University of Tokyo. The aims of the Surveys are to uncover the benthic marine fauna of the coastal areas in and around Sagami Bay, and to form a collaborative network between marine biologists across Japan. We have so far performed six surveys, with over 100 participants in total, using common equipment such as dredges, bottom mud samplers, and epibenthic sleds. Even in Sagami Bay, one of the most intensively studied marine environments in the world, we have succeeded in collecting about 50 probable undescribed species. Other species were collected for the first time from Sagami Bay or found from previously unreported depth. The Surveys could be useful for ecological and environmental studies as well. We plan to continue the JAMBIO Coastal Organism Joint Surveys to further reveal the rich biodiversity within and around Sagami Bay and to accelerate nationwide research collaborations. We also hope to expand the Surveys to include plants and protists, and to perform them at other areas in Japan. Through the Surveys, we aim to develop new cross-disciplinary research areas and to record the long-term transition of biota along the Japanese coast. (C) 2015 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.rsma.2015.05.003

    Web of Science

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Books 4

  1. 鳥羽市海のレッドデータブック : 鳥羽市の絶滅のおそれのある野生生物

    鳥羽市( Role: Contributor ,  その他無脊椎動物)

    鳥羽市役所観光商工課  2023.8  ( ISBN:9784893990600

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    Total pages:297p   Language:Japanese

    CiNii Books

  2. 海産無脊椎動物多様性学 100年の歴史とフロンティア

    自見直人( Role: Contributor ,  イッスンボウシウロコムシ──矮雄を背負う変なゴカイ)

    京都大学学術出版会  2022.10 

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    Language:Japanese Book type:Scholarly book

  3. 小学館の図鑑NEO 深海生物

    藤原 義弘(環形動物)

    小学館  2021.6  ( ISBN:9784092172265

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    Total pages:183p   Language:Japanese

    CiNii Books

  4. 海の生き物観察ノート⑭ ゴカイのなかまを観察しよう

    柳研介(編集, 執筆) 多留聖典, 田中正敦, 自見直人

    千葉県立中央博物館分館海の博物館  2018.3 

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    Total pages:31   Language:Japanese

MISC 9

  1. ゴカイ道 Invited

    自見直人

    タクサ:日本動物分類学会誌   Vol. 55   page: 1 - 8   2023.9

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    Authorship:Lead author, Last author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    DOI: 10.19004/taxa.55.0_1

  2. 白鳳丸世界一周KH-19-6航海での南半球ベントス採集記

    Akito OGAWA, Naoto JIMI, Shimpei HIRUTA, Genki KOBAYASHI, Koji SEIKE, Hidetaka NOMAKI

    Japanese Journal of Benthology   Vol. 75 ( 0 ) page: 65 - 70   2020.12

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    Publisher:The Japanese Association of Benthology  

    DOI: 10.5179/benthos.75.65

  3. Zootaxa誌に対するImpact Factorの削除と回復についての顛末(概要報告)—これからの動物分類学における留意事項のひとつ—

    島野 智之, 中野 隆文, 新田 理人, 岡西 政典, 畑 晴陵, 武藤 望生, 自見 直人, 山崎 博史, 大土 直哉

    タクサ—日本動物分類学会誌   Vol. 49 ( 49 ) page: 74 - 74   2020.8

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    Language:Japanese   Publishing type:Rapid communication, short report, research note, etc. (scientific journal)   Publisher:日本動物分類学会  

    DOI: 10.19004/taxa.49.0_74

  4. 2019年日本ベントス学会・日本プランクトン学会合同大会自由集会2「環形動物の多様性と進化」開催報告

    小林元樹, 杉山高大, 阿部博和, 中村真悠子, 自見直人, 後藤龍太郎

    日本ベントス学会誌   Vol. 74 ( 2 ) page: 136 - 139   2020

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    Language:Japanese  

    DOI: 10.5179/benthos.74.136

  5. Deep-sea macrobenthos biodiversity survey at the Southern Ocean in KH-19-6 Leg 4

    JIMI Naoto, OGAWA Akito, HIRUTA Shimpei F., CHEN Chong, KOBAYASHI Itaru, KOMATSU Hironori, OKANISHI Masanori, PRATAMA Gregorius Altius, IMURA Satoshi, NOMAKI Hidetaka, TANI Kenichiro, IKEHARA Minoru

    極域科学シンポジウム(Web)   Vol. 11th   2020

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  6. Survey of benthic animals in the Kumano Sea by training/research vessel Seisui-maru

    自見直人, 木村昭一, 小川晟人, 木村妙子

    タクサ   Vol. 48   2020

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  7. 「若手分類学者の集い」の10年

    伊勢戸 徹, 岡西政典, 生野賢司, 瀬尾絵理子, 堀越彩香, 照屋清之介, 林 亮太, 福森啓晶, 小林元樹, 自見直人, 山崎剛史, 菊地波輝, 田中 颯, 東 亮一, 鈴木隆仁, 神保宇嗣

    タクサ   Vol. 47 ( 0 ) page: 30 - 38   2019

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    Language:Japanese   Publisher:日本動物分類学会  

    DOI: 10.19004/taxa.47.0_30

    CiNii Books

  8. かいれいKR18‐15航海により南西諸島周辺から得られた深海生物

    角井敬知, 自見直人, 大矢佑基, 藤原義弘, 矢吹彬憲, 下村通誉, 柳研介, 上野大輔, 広瀬雅人, 田中隼人, 藤本心太, 小川晟人, 岡本章玄, 久野光輝

    ブルーアースサイエンス・テク要旨集   Vol. 2019   page: 42   2019

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    Language:Japanese  

    J-GLOBAL

  9. ベーリング海南東部における「アリューシャン・マジック」観測

    藤原義弘, 土田真二, 野牧秀隆, LANGLET D., WEINER A., 藤木徹一, 原田尚美, 藤倉克則, 山口篤, 角井敬知, 自見直人, HUNT J. C., BERGMAN L., 小川晟人, 中藤千晶, 小磯桃子, 渡辺茂樹

    ブルーアースサイエンス・テク要旨集   Vol. 2018   2018

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KAKENHI (Grants-in-Aid for Scientific Research) 11

  1. Understanding tephra transport and deposition processes and its impact on marine ecology associated with August 2021 eruption of the Fukutoku-Oka-no-Ba volcano

    Grant number:23H01278  2023.4 - 2026.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s) 

  2. 環形動物におけるカメラ眼の獲得とそれに伴う中枢神経系の構造進化

    Grant number:22K15165  2022.4 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists  Grant-in-Aid for Early-Career Scientists

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    Authorship:Principal investigator 

    Grant amount:\4550000 ( Direct Cost: \3500000 、 Indirect Cost:\1050000 )

  3. 八放サンゴ共生性ウロコムシ類の系統分類学

    2022.4 - 2023.3

    昭和聖徳記念財団  学術研究助成 

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    Authorship:Principal investigator 

  4. 多毛類の起立性巣群落による岩礁域における生物多様性創出機構の解明

    2022.4 - 2023.2

    公益財団法人 日本科学協会  笹川科学研究助成 

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    Authorship:Principal investigator 

  5. 海産環形動物絶滅危惧種の特定のための網羅的DNAバーコーディング:希少種の探索,新種記載と分類の整理,および分布情報の集積の促進

    2020.4 - 2023.3

    独立行政法人環境再生保全機構  環境研究総合推進費 

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    Authorship:Coinvestigator(s) 

  6. キブクレハボウキ属多毛類を用いた骨片生成機構の解明

    Grant number:19J00160  2019.4 - 2022.3

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    自見 直人, 自見 直人

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    Authorship:Other 

    多毛類における骨片の獲得機構の解明を目的とする。そのためにまず骨片を保持している種の把握・系統的位置の把握を行う。その後骨片保持種と近縁の系統間での薄片切片等を用いた内部形態の比較を行う。これらの結果を元に多毛類における骨片獲得の過程を明らかにする。
    分子系統解析において必要となる比較対象である多毛類の各科、なかでもハボウキゴカイ科、クマノアシツキ科、ミズヒキゴカイ科の標本を引き続き重点的に収集した。これらの標本はそれぞれCOI, 16S, 18S, 28Sの遺伝子領域配列を既に決定した。これらの種においては分類学的な整理をまず行い、未記載種である場合は記載した。特にキブクレハボウキに近縁な(または内包すると考えられている)カンテンハボウキ属の5新種を記載し、遺伝子配列を得たことで、本属およびカンテンハボウキ属の系統関係解明に大きく寄与した。南極域から採集した多毛類について各分類群の網羅的な生物相の論文として投稿した。また、オーストラリアの研究者と共同研究を行い、亜南極に生息する多毛類の形態・分類学的な研究を行い論文として出版した。
    その他の成果についても論文としての出版を行った。分子系統解析については現在多くの共同研究者と共に協調して進めている。
    その他の比較用サンプルについても採集を進めており、順調に採集・形態観察・遺伝子解析を進めることができている。これについては随時論文として出版し分類学的な整理を行うことで整理していく予定である。
    次世代シーケンサーを用いたショットガンシーケンスにより多毛類20種のミトコンドリア全長配列および18S, 28Sの全長配列を取得することに成功した。データ量が多く解析にパソコンのスペックが必要なため現在別の拠点において解析中である。解析後分子系統解析に用いることでさらに高精度の系統関係推定を行うことができると考えている。
    COVID-19で中止になった南極における観測に再度挑戦するために現在複数の共同研究を進めており、順調に進めば来年度現地における観測が可能である。そこでキブクレハボウキの生体を採集することによりさらに詳細な骨片生成機構を明らかにすることができる。
    令和3年度が最終年度であるため、記入しない。
    令和3年度が最終年度であるため、記入しない。

  7. 極限環境である深海域への適応機構の解明

    Grant number:17J05066  2017.4 - 2019.3

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    自見 直人

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\1900000 ( Direct Cost: \1900000 )

    平成30年度は前年度に引き続き深海域の多毛類のサンプリングを行った。日本各地およびパナマ・アメリカにおいてサンプリングを行った。実行予定であった南西諸島における調査航海に参加し2000 m、5000 mの大深度のサンプルを得ることができた。これらのサンプルについては今後切片標本を作成する予定である。他の得られた標本についても随時観察用切片標本を作成中である。これらの切片を作成後浅海域と深海域での組織構造の比較を行う予定である。
    また、課題遂行の過程で得られた成果であるウロコムシ科・タンザクゴカイ科多毛類の分類・系統学的データを2本の論文として査読付き英文雑誌に公表した。本成果は浅海から4500 mの幅広い水深から採集された個体をもとに行った1新属2新種の記載を含む。特にタンザクゴカイ科の新属新種であるSpathochaeta octopodisは生態的・系統的にも興味深い種であり、今後詳細な議論を行うためにはさらなるOTUおよび遺伝子領域の追加が必要であるため今後の課題としたい。また現在ウジムカシゴカイ科、ウミケムシ科、ボウセキウロコムシ科多毛類の成果を3本の論文として査読付き英文雑誌に投稿中である。これら以外にも未知の属・種が多く採集されており、それらの分類学的および系統学的位置を把握するためには今後も継続した研究が必要である。それら分類学・系統学的成果を今後2本の論文として査読付き英文雑誌に投稿予定である。
    前年度との成果と合わせると多くの日本未記録の属が記録されており、深海域適応進化を解明する上で重要な情報となる深海性多毛類の多様性・系統関係の整理に貢献した。

  8. サンゴ穿孔性ハボウキゴカイは外来種と成り得るか? アクアリウムを通じた多毛類の移入の現状把握と検証

    2016.4 - 2018.3

    公益財団法人 水産無脊椎動物研究所  育成研究助成 

    自見直人

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    Authorship:Principal investigator  Grant type:Competitive

  9. 有機汚濁指標生物ミズヒキゴカイは隠蔽種を含むのか ~環境評価の精度向上に向けた取り組み~

    2015.8 - 2016.3

    一般財団法人自然環境研究センター  公益信託ミキモト海洋生態研究助成基金 

    自見直人

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    Authorship:Principal investigator  Grant type:Competitive

  10. 三崎周辺における多毛類の分類学的研究―多毛類を用いた多様性評価を目指して

    2015.4 - 2016.3

    マリンバイオ共同推進機構JAMBIO  JAMBIO公募共同利用・共同研究 

    冨岡森理

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    Grant type:Competitive

  11. Taxonomic studies on early-branching myzozoan protists

    Grant number:26840133  2014.4 - 2016.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    Yabuki Akinori, Kevin Wakeman, Kusaka Chiho, Tame Akihiro, Jimi Naoto

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    We successfully established 59 cultures of microbial eukaryotes in total and taxonomic studies have been conducted using these cultures. For instance, one culture was of Hemistasia phaeocysticola which was originally described as a member of Myzozoa. The phylogenetic analyses newly revealed that H. pheocysticola does not belong to Myzozoa, but to Euglenozoa. Hence, H. pheocysticola was taxonomically transferred into Euglenozoa in the published paper. By the further and continuous taxonomic studies using other cultures, the diversity of eukaryotic microbes will be understood more properly. When it was difficult or impossible to establish the cultures of the target protists, we conducted the taxonomic studies with the isolated cells. We also conducted the study to understand how complex structural mitochondrial genome and genes have been established by analyzing the established cultures during this period.

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Teaching Experience (On-campus) 6

  1. Summer Course In Marine Biology (International MarineBiology Course)

    2023

  2. Selected Topics in Biology Ⅱa

    2023

  3. Laboratory Courses in Marine Biology

    2023

  4. Selected Topics in Biology Ⅱa

    2022

  5. Laboratory Courses in Marine Biology

    2022

  6. Summer Course In Marine Biology (International MarineBiology Course)

    2022

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Teaching Experience (Off-campus) 3

  1. Marine Biology Course

    2021.9 Nagoya University)

  2. Marine Biology Course

    2021.7 Nagoya University)

  3. 生物学

    2016.4 - 2017.3 北海道ハイテクノロジー専門学校)