Onychocamptus Daday, 1903 from Thailand, with descriptions of two new species and two new records (Crustacea, Copepoda, Harpacticoida, Laophontidae)

In this paper, two new species of Daday, 1903 are described from Thailand: and The following features mainly distinguish from known species: internal sausage-like and internal rounded structures on cephalothorax and one outer seta on the male P5 exopod that is as long as the supporting segment. In c...

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Bibliographic Details
Published in:ZooKeys 2018-12, Vol.810 (810), p.45-89
Main Authors: Boonyanusith, Chaichat, Saetang, Thanida, Wongkamheng, Koraon, Supiyanit Maiphae
Format: Article
Language:English
Subjects:
Copepoda
Far East
Harpacticoida
Laophontidae
New records
New species
Onychocamptus
Physical characteristics
Systematics
Thailand
Zoology
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Summary:In this paper, two new species of Daday, 1903 are described from Thailand: and The following features mainly distinguish from known species: internal sausage-like and internal rounded structures on cephalothorax and one outer seta on the male P5 exopod that is as long as the supporting segment. In contrast, the cephalothorax of is smooth but has rounded integumental window-like structures, and the outer seta on the male P5 exopod is two times as long as the supporting segment. shows the highest similarity with the two new species, but in contrast to both Thai species, it has only one seta on the exopod of the antenna. In addition, in the present study, two additional species, and , are newly recorded in Thailand. Thus, the number of species recorded in Thailand increases to five species. A key to all known species of this genus in the world is also proposed.
ISSN:1313-2989
1313-2970
DOI:10.3897/zookeys.810.29253