Podarkeopsis chinensis sp. nov. (Annelida, Hesionidae) from southeastern China

Shan Tong, Deyuan Yang, Jian Wen Qiu, Caihuan Ke, Zhi Wang*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review


Podarkeopsis chinensis sp. nov. (Annelida, Hesionidae) is described based on specimens collected from the coast of southeast China. It is the first Podarkeopsis species described from the Indo-Pacific, although there are already nine valid Podarkeopsis species known from other parts of the world. This new species can be distinguished from the other Podarkeopsis species in having a palpostyle as long as the palpophore and double aciculae in both notopodia and neuropodia, and in bearing bifid furcate chaetae which have a smooth base on the shorter tine. A phylogenetic analysis based on the concatenated sequences of five gene fragments (COI, 16S rRNA, 18S rRNA, 28S rRNA, and histone H3) from 18 specimens of P. chinensis sp. nov. showed that they formed a monophyletic clade that is sister to P. levifuscina. K2P genetic distances indicated that the four gene fragments (COI, 16S rRNA, 18S rRNA, and 28S rRNA) of P. chinensis sp. nov. diverged from the corresponding sequences of the closest related species of Podarkeopsis in GenBank and BOLD Systems by 21.1–27.5%, 20.3–23.1%, 0.1–0.2%, and 2.1–3.2%. An identification key is provided for species in the genus Podarkeopsis.

Original languageEnglish
Pages (from-to)339-355
Number of pages17
Publication statusPublished - 7 Aug 2023

Scopus Subject Areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology
  • Agricultural and Biological Sciences (miscellaneous)
  • Insect Science
  • Palaeontology

User-Defined Keywords

  • Identification key
  • Indo-Pacific
  • molecular phylogeny
  • morphology
  • new species
  • polychaete
  • systematics


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