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Review of Onyx Cobb (Nematoda: Desmodoridae) with description of two new species from the Yellow Sea, China

Published online by Cambridge University Press:  27 April 2015

Yong Huang  and
Haixia Wang
Yong Huang*
Affiliation:
College of Life Sciences, Liaocheng University, 1 Hunan Road, Liaocheng, 252059, P. R. China Key Laboratory of Ecology and Biodiversity of Colleges and Universities in Shandong Province, Liaocheng University, Liaocheng, 252059, P. R. China
Haixia Wang
Affiliation:
College of Life Sciences, Liaocheng University, 1 Hunan Road, Liaocheng, 252059, P. R. China
*
Corresponding author: Y. Huang, College of Life Science, Liaocheng University1 Hunan Road, Liaocheng, Shandong 252000, P. R. China E-mail: [email protected]
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Abstract

Genus Onyx Cobb, 1891 has been reviewed and 19 valid species including two new species have been reported in the world. Two new species, Onyx rizhaoensis sp. nov. and Onyx minor sp. nov. from the Yellow Sea coast are described and illustrated. In addition to the genus characters Onyx rizhaoensis sp. nov. has relatively long cephalic setae; a single loop-shaped amphidial fovea; 12 S-shaped tubular precloacal supplements in 10 + 2 arrangement, posterior 10 closely spaced, anterior two set apart; female vulva situated at almost midpoint of the body. Onyx minor sp. nov. is characterized by a relatively small body for the genus (body length usually shorter than 800 μm); gubernaculum slender parallel to spicules and with a hooked dorsal apophysis; 12 S-shaped tubular precloacal supplements fairly evenly spaced; female vulva situated at about midbody. At the same time, a dichotomous key for Onyx males is proposed.

Keywords

free-living marine nematodeOnyx rizhaoensis sp. nov.Onyx minor sp. nov.taxonomy
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 95 , Issue 6 , September 2015 , pp. 1127 - 1132
Copyright
Copyright © Marine Biological Association of the United Kingdom 2015 

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References

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