Two new species in the Echinoderes coulli group (Echinoderidae, Cyclorhagida, Kinorhyncha) from the Ryukyu Islands, Japan

Hiroshi Yamasaki, Shinta Fujimoto

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Two new species belonging to the Echinoderes coulli group are described with their external morphologies and sequences of nuclear 18S rRNA and 28S rRNA genes, and mitochondrial COI gene. The first species, Echinoderes komatsui sp. n., is characterized by absence of acicular spines, and presence of lateroventral tubules on segments 5 and 8, laterodorsal tubules on segment 10, inverted triangle or wide oval shaped large sieve plates, lateral terminal accessory spines in female, and short tips of ventral pectinate fringe on segment 10. The second species, Echinoderes hwiizaa sp. n., is characterized by absence of acicular spines, and presence of lateroventral tubules on segments 5 and 7-9, midlateral tubules on segment 8, latero-dorsal tubules on segment 10, large narrow oval shaped sieve plates on segment 9, and thick, short and blunt lateral terminal spines about 10-15% of trunk length. The diagnostic characters and key to species of E. coulli group are provided as well.

Original languageEnglish
Pages (from-to)27-52
Number of pages26
JournalZooKeys
Volume382
DOIs
Publication statusPublished - 2014 Feb 28
Externally publishedYes

Keywords

  • Echinoderes
  • Ishigaki
  • Kinorhyncha
  • Meiofauna
  • Okinawa
  • Taxonomy

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

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