A new free-living marine nematode species of Rhinema from the South China Sea

  • Hongxiu Zhai
  • Mian Huang
  • Yong HuangEmail author


A new free-living marine nematode species of the genus Rhinema belonging to the family Monoposthiidae was collected from marine sediments in the Qiongzhou Strait of the South China Sea, and it is described here as Rhinema longispicula sp. nov. The new species is characterized by coarsely annulated cuticle with 12 longitudinal ridges (alae) marked as reversed V-shaped. The first and second annuli broader and form a kind of a cephalic capsule. The amphideal fovea circular, situated in the middle of the broad second annulus, not surrounded by dense annulations. Buccal cavity cylindrical with a large dorsal tooth. Pharynx with a prominent anterior pharyngeal bulb and an elongated terminal bulb. Elongate spicules strongly curved, with cephalated proximal end and pointed distal end. Gubernaculum boat-shaped, without apophysis. A long and blunt precloacal seta present. Female with two opposed, outstretched ovaries.


Rhinema longispicula sp. nov. free-living marine nematode taxonomy 


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The authors are very thankful to all crew members of R/V Kexue 3 for their kind help in samples collection. We are sincerely grateful to two anonymous referees for providing valuable criticisms and improving on manuscript.


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Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Life SciencesLiaocheng UniversityLiaochengChina
  2. 2.Department of Marine Organism Taxonomy and Phylogeny, Institute of OceanologyChinese Academy of SciencesQingdaoChina
  3. 3.University of Chinese Academy of ScienceBeijingChina

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