Animal Systematics, Evolution and Diversity

The Korean Society of Systematic Zoology (한국동물분류학회)
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A New Free-Living Marine Nematode, Chaetonema longicorpus sp. nov. (Enoplida: Anoplostomatidae) from a Subtidal Zone of the East Sea, Korea

  • Lee, Hyo Jin (East Sea Environment Research Center, Korea Institute of Ocean Science and Technology (KIOST)) ;
  • Lee, Heegab (East Sea Environment Research Center, Korea Institute of Ocean Science and Technology (KIOST)) ;
  • Rho, Hyun Soo (East Sea Environment Research Center, Korea Institute of Ocean Science and Technology (KIOST))
  • Received : 2022.09.30
  • Accepted : 2022.10.13
  • Published : 2022.10.31
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Abstract

A new free-living marine nematode, Chaetonema longicorpus sp. nov., was discovered in a subtidal benthic habitat around the Uljin nuclear power plant in the East Sea. Chaetonema longicorpus sp. nov. differs from other Chaetonema species in its very long body length, relatively long cephalic setae, long and narrow buccal cavity, bottle-shaped amphideal fovea, short spicules, only one pre-cloacal seta instead of a pre-cloacal supplement, and conspicuous ventral swelling at the middle of the tail. Herein, we provide a taxonomic description and illustrations of this new species using differential interference contrast microscopy. Furthermore, an illustrated pictorial key to all valid species, including the new species and comparative tables on the biogeographical and morphological characteristics of the genus Chaetonema, are provided.

Keywords

Acknowledgement

This research was supported by a grant from the National Marine Biodiversity Institute of Korea (2022M01100) and by the research projects of the Korea Institute of Ocean Science and Technology (PEA0013, PEA0016).

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