Bryocyclops asetus sp. n. and the presence of Bryocyclops muscicola (Menzel, 1926) from Thailand (Crustacea, Copepoda, Cyclopoida, Cyclopidae)

By

Watiroyram, Santi

Type

Article

Date of Publication

2018

Original Publication

ZooKeys

Volume

793

Pages

29-51

Subjects

Caves , copepods , freshwater , new species , redescription of Bryocyclops muscicola , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.793.25005

 

Abstract

The description ofBryocyclopsasetussp. n.and the record ofB.muscicola(Menzel, 1926) from Thailand are presented. The new species is most similar toB.maewaensisWatiroyram, Brancelj & Sanoamuang, 2012, the cave-dwelling species described from northern and western Thailand. They share morphological characteristics, such as the free margin of the anal operculum which is ovated and serrate, the same setae and the spines formulae on P1–P4Exp-2 (setae: 5.5.5.4; spines: 3.3.3.3) and Enp-2 of P1–P2, P4 (setae formula 3.4.3) in both sexes. The new species is easily distinguished fromB.maewaensisdue to typical divergent caudal rami, the absence of coxal seta on P1, and the absence of blunt-tipped setae on P2–P3Exp-2. A dichotomous key to the species ofBryocyclopsgroup IsensuLindberg (1953) is proposed.