Chapter

Genus Hemirhabdus Wolfenden 1911

Taisoo Park

in Taxonomy and Distribution of the Calanoid Copepod Family Heterorhabdidae

Published by University of California Press

Published in print April 2001 | ISBN: 9780520098428
Published online March 2012 | e-ISBN: 9780520916029 | DOI: http://dx.doi.org/10.1525/california/9780520098428.003.0007
Genus Hemirhabdus Wolfenden 1911

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This chapter describes the genus Hemirhabdus. It distinguishes the species from Disseta, Mesorhabdus, and Heterostylites by the following features: body massive; the masticatory edge of Md with the ventralmost tooth separated from the other teeth by an extremely wide gap; in Mx2, the second lobe is missing, the third and fourth lobes have only small and unarmed setae, and the endopod has only two setae; in the left A1 of the male, the first two segments are only partially fused and the last five (twenty-first to the twenty-fifth) segments all separate. The chapter notes however, that Hemirhabdus shares the following features with Heterostylites; the Mx1 with a third inner lobe is missing; the masticatory edge of Md is without a group of small, contiguous teeth next to the basal spine; the coxa of Mxp has only two distal lobes bearing one seta on the first and second or third setae on the second; the third endopodal segment of P2 has seven setae.

Keywords: Hemirhabdus; Disseta; Mesorhabdus; Heterostylites

Chapter.  3800 words. 

Subjects: Zoology and Animal Sciences

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