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A new marine tardigrade, Tanarctus diplocerus (Arthrotardigrada: Halechiniscidae) from Japan

Published online by Cambridge University Press:  05 July 2012

Shinta Fujimoto ,
Katsumi Miyazaki  and
Atsushi C. Suzuki
Shinta Fujimoto
Affiliation:
Department of Zoology, Division of Biological Science, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
Katsumi Miyazaki
Affiliation:
Seto Marine Biological Laboratory, Field Science Education and Research Centre, Kyoto University, Wakayama 649-2211, Japan
Atsushi C. Suzuki*
Affiliation:
Department of Biology, Keio University, Yokohama 223-8521, Japan
*
Correspondence should be addressed to: A.C. Suzuki, Department of Biology, Keio University, Yokohama 223-8521, Japan email: [email protected]
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Abstract

A new marine tardigrade of the genus Tanarctus is described from Japan. Tanarctus diplocerus sp. nov. was collected from Shimabara Bay, Kumamoto and Tanabe Bay, Wakayama. It is characterized by simple leg IV appendages, the lack of the internal–external relation in the dorsal and ventral cirri and the lack of the club-shaped secondary clavae. The secondary sexual dimorphism of the primary clavae and probable two-digit juveniles of the new species are reported. The problematic terminology of the so-called ‘internal’ and ‘external’ cirri is also discussed. A taxonomic key for the species of Tanarctus is provided.

Keywords

TardigradaShimabara BayTanabe Baysub-tidal
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Issue 4 , June 2013 , pp. 955 - 961
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012 

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