| 1. |
Katarzyna Grzelak,Hiroshi Yamasaki,Sarah Mincks,Anna J. Phillips,Martin V. Sørensen, Revision of an Arctic kinorhynch species: Echinoderes svetlanae and E. tubilak are junior synonyms of E. remanei, Zoologischer Anzeiger, 10.1016/j.jcz.2022.11.001, 302, 75-89, 2023.01, A new species Polacanthoderes shiraseae sp. nov. from three Antarctic regions (off Cape Darnley, off Totten Glacier, and in Lützow-Holm Bay) is described. In addition, type species of Polacanthoderes, Polacanthoderes martinezi, is redescribed. The new species is distinguished from P. martinezi by the presence of conspicuously thick lateroventral acicular spines on segments 8 and 9 and the presence of sublateral small acicular spines on segment 7. Both P. martinezi and P. shiraseae sp. nov. occasionally show intraspecific morphological variations in the position of some small acicular spines. The K2P genetic distances based on the mitochondrial cytochrome c oxidase subunit 1 gene sequences in P. shiraseae sp. nov. are 0–1.5%, equivalent to those in other echinoderid species. Phylogenetic analyses of Polacanthoderes based on the nuclear 18S rRNA and 28S rRNA gene sequences support the inclusion of the genus in Echinorhagata/Echinoderidae and suggest that the genus represents the most basal group of this order/family.. |
| 2. |
Hiroshi Yamasaki, Shinta Fujimoto, HayatoTanaka, Daisuke Shimada, Masato Ito, Yuki Tokuda, Megumu Tsujimoto, Taxonomy, genetic diversity, and phylogeny of the Antarctic mud dragon, Polacanthoderes (Kinorhyncha: Echinorhagata: Echinoderidae)., Zoologischer Anzeiger, 10.1016/j.jcz.2022.09.003, 301, 42-58, 2022.09, A new species Polacanthoderes shiraseae sp. nov. from three Antarctic regions (off Cape Darnley, off Totten Glacier, and in Lützow-Holm Bay) is described. In addition, type species of Polacanthoderes, Polacanthoderes martinezi, is redescribed. The new species is distinguished from P. martinezi by the presence of conspicuously thick lateroventral acicular spines on segments 8 and 9 and the presence of sublateral small acicular spines on segment 7. Both P. martinezi and P. shiraseae sp. nov. occasionally show intraspecific morphological variations in the position of some small acicular spines. The K2P genetic distances based on the mitochondrial cytochrome c oxidase subunit 1 gene sequences in P. shiraseae sp. nov. are 0–1.5%, equivalent to those in other echinoderid species. Phylogenetic analyses of Polacanthoderes based on the nuclear 18S rRNA and 28S rRNA gene sequences support the inclusion of the genus in Echinorhagata/Echinoderidae and suggest that the genus represents the most basal group of this order/family..  |
| 3. |
Hiroshi Yamasaki, Maria Herranz, Martin V. Sørensen, An interactive identification key to species of Echinoderidae (Kinorhyncha), Zoologischer Anzeiger, 10.1016/j.jcz.2020.05.002, 287, 14-16, 2020.07, An interactive, continuously updated identification key to species of the large kinorhynch family Echinoderidae has been made available online. The key is based on the DELTA format (DEscription Language for TAxonomy), and provides, with a multiple entry approach, an intuitive and user friendly tool to identify more than 145 echinoderid species. The present short note describes software requirements, how to access the database and keep it updated, and how to use the identification tools.. |
| 4. |
Hiroshi Yamasaki, Shinta Fujimoto, Hayato Tanaka, Three new meiobenthic species from a submarine cave in Japan
Echinoderes gama, E. kajiharai and E. uozumii (Kinorhyncha: Cyclorhagida), Journal of the Marine Biological Association of the United Kingdom, 10.1017/S0025315420000429, 100, 4, 537-558, 2020.06, Three new species of echinoderid kinorhynchs are described from Daidokutsu, a submarine cave in Ryukyu Islands, Japan. Echinoderes gama sp. nov. is characterized by the presence of middorsal acicular spines on segments 4-8; lateroventral acicular spines on segments 7-9; lateroventral tubes on segment 5; sublateral tubes on segment 8; laterodorsal tubes on segment 10; and type-2 gland cell outlets in subdorsal and lateroventral position on segment 2. Echinoderes kajiharai sp. nov. is defined by the presence of middorsal acicular spines on segments 4, 6, 8; lateral accessory acicular spines on segment 9; lateroventral acicular spines on segments 6-8; lateroventral tubes on segments 2 and 5; midlateral tubes on segment 10; and type-2 gland cell outlets in laterodorsal position on segments 2 and 5, and subdorsal position on segments 8 and 9. Echinoderes uozumii sp. nov. is characterized by the presence of middorsal acicular spines on segments 4 and 6; lateroventral acicular spines on segments 6-9; lateroventral tubes on segments 2 and 5; sublateral tubes on segment 8; laterodorsal tubes on segment 10; type-2 gland cell outlets in subdorsal and lateral accessory position on segment 2; and blunt, short pectinate fringe teeth of primary pectinate fringe on segment 1. In addition, the Echinoderes multiporus species group including E. kajiharai sp. nov., and the Echinoderes bispinosus species group including E. uozumii sp. nov. are established. Furthermore, the distribution of the two species groups and the origin of Echinoderes species in Daidokutsu are discussed.. |
| 5. |
Yamasaki H., Gracilideres mawatarii, a new genus and species of Franciscideridae (Allomalorhagida: Kinorhyncha) - A kinorhynch with thin body cuticle, adapted to the interstitial environment, ZOOLOGISCHER ANZEIGER, 10.1016/j.jcz.2019.05.010, 282, 176-188, 2019.09. |
| 6. |
Yamasaki H., Dal Zotto M., Investigation of echinoderid kinorhynchs described 90 years ago: redescription of Echinoderes capitatus (Zelinka, 1928) and Echinoderes ferrugineus Zelinka, 1928, ZOOLOGISCHER ANZEIGER, 10.1016/j.jcz.2019.05.013, 282, 189-205, 2019.09. |
| 7. |
Yamasaki H., Neuhaus B. George K.H., Echinoderid mud dragons (Cyclorhagida: Kinorhyncha) from Senghor Seamount (NE Atlantic Ocean) including general discussion of faunistic characters and distribution patterns of seamount kinorhynchs, ZOOLOGISCHER ANZEIGER, 10.1016/j.jcz.2019.05.018, 282, 64-87, 2019.09. |
| 8. |
Yamasaki H., Grzelak K., Sørensen M.V., Neuhaus B., George K.H., Echinoderes pterus sp n. showing a geographically and bathymetrically wide distribution pattern on seamounts and on the deep-sea floor in the Arctic Ocean, Atlantic Ocean, and the Mediterranean Sea (Kinorhyncha, Cyclorhagida), ZOOKEYS, 10.3897/zookeys.771.25534, 771, 15-40, 2018.07. |
| 9. |
Uozumi R., Yamasaki H., Hirose E., Mangrove forests may serve as stable environments for the meiobenthic Echinoderes komatsui (Kinorhyncha: Cyclorhagida): distribution patterns and population dynamics in a subtropical estuary, MARINE BIOLOGY RESEARCH, 10.1080/17451000.2017.1408916, 14, 3, 321-333, 2018.01. |
| 10. |
Yamasaki H., Ryuguderes iejimaensis, a new genus and species of Campyloderidae (Xenosomata: Cyclorhagida: Kinorhyncha) from a submarine cave in the Ryukyu Islands, Japan, ZOOLOGISCHER ANZEIGER, 10.1016/j.jcz.2016.02.003, 265, 69-79, 2016.11. |
| 11. |
Sørensen M.V., Dal Zotto M., Rho H.S., Herranz M., Sánchez N., Pardos F., Yamasaki H., Phylogeny of Kinorhyncha Based on Morphology and Two Molecular Loci, PLOS ONE, 10.1371/journal.pone.0133440, 10, 7, 2015.07. |
| 12. |
Yamasaki H., Fujimoto S., Miyazaki K., Phylogenetic position of Loricifera inferred from nearly complete 18S and 28S rRNA gene sequences, ZOOLOGICAL LETTERS, 10.1186/s40851-015-0017-0, 1, 2015.06. |
| 13. |
Yamasaki H., Hiruta S.F., Kajihara H., Dick M.H., Two Kinorhynch Species (Cyclorhagida, Echinoderidae, Echinoderes) Show Different Distribution Patterns Across Tsugaru Strait, Northern Japan, ZOOLOGICAL SCIENCE, 10.2108/zs140011, 31, 7, 421-429, 2014.07. |
| 14. |
Yamasaki H., Hiruta S.F., Kajihara H., Molecular phylogeny of kinorhynchs, MOLECULAR PHYLOGENETICS AND EVOLUTION, 10.1016/j.ympev.2013.02.016, 67, 2, 303-310, 2013.05. |
