Taxonomy, genetic diversity, and phylogeny of the Antarctic mud dragon, Polacanthoderes (Kinorhyncha: Echinorhagata: Echinoderidae)

Hiroshi Yamasaki; Shinta Fujimoto; Hayato Tanaka; Daisuke Shimada; Masato Ito; Yuki Tokuda; Megumu Tsujimoto

doi:10.1016/j.jcz.2022.09.003

Taxonomy, genetic diversity, and phylogeny of the Antarctic mud dragon, Polacanthoderes (Kinorhyncha: Echinorhagata: Echinoderidae)

Hiroshi Yamasaki, Shinta Fujimoto, Hayato Tanaka, Daisuke Shimada, Masato Ito, Yuki Tokuda, Megumu Tsujimoto

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	42-58
Number of pages	17
Journal	Zoologischer Anzeiger
Volume	301
DOIs	https://doi.org/10.1016/j.jcz.2022.09.003
Publication status	Published - Nov 2022
Externally published	Yes

Keywords

DESS
JARE
K2P distance
Meiofauna
New species

Access to Document

10.1016/j.jcz.2022.09.003

Cite this

@article{774beb3c61154dbaa006d4eb441dc72d,

title = "Taxonomy, genetic diversity, and phylogeny of the Antarctic mud dragon, Polacanthoderes (Kinorhyncha: Echinorhagata: Echinoderidae)",

abstract = "A new species Polacanthoderes shiraseae sp. nov. from three Antarctic regions (off Cape Darnley, off Totten Glacier, and in L{\"u}tzow-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.",

keywords = "DESS, JARE, K2P distance, Meiofauna, New species",

author = "Hiroshi Yamasaki and Shinta Fujimoto and Hayato Tanaka and Daisuke Shimada and Masato Ito and Yuki Tokuda and Megumu Tsujimoto",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier GmbH",

year = "2022",

month = nov,

doi = "10.1016/j.jcz.2022.09.003",

language = "English",

volume = "301",

pages = "42--58",

journal = "Zoologischer Anzeiger",

issn = "0044-5231",

publisher = "Urban und Fischer Verlag Jena",

}

TY - JOUR

T1 - Taxonomy, genetic diversity, and phylogeny of the Antarctic mud dragon, Polacanthoderes (Kinorhyncha: Echinorhagata: Echinoderidae)

AU - Yamasaki, Hiroshi

AU - Fujimoto, Shinta

AU - Tanaka, Hayato

AU - Shimada, Daisuke

AU - Ito, Masato

AU - Tokuda, Yuki

AU - Tsujimoto, Megumu

PY - 2022/11

Y1 - 2022/11

N2 - 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.

AB - 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.

KW - DESS

KW - JARE

KW - K2P distance

KW - Meiofauna

KW - New species

UR - http://www.scopus.com/inward/record.url?scp=85138656207&partnerID=8YFLogxK

U2 - 10.1016/j.jcz.2022.09.003

DO - 10.1016/j.jcz.2022.09.003

M3 - Article

AN - SCOPUS:85138656207

SN - 0044-5231

VL - 301

SP - 42

EP - 58

JO - Zoologischer Anzeiger

JF - Zoologischer Anzeiger

ER -

Taxonomy, genetic diversity, and phylogeny of the Antarctic mud dragon, Polacanthoderes (Kinorhyncha: Echinorhagata: Echinoderidae)

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this