Species:
Patrus nanensis (Suksai et al., 2021)ClassificationPhylum: Arthropoda Class: Insecta Order: Coleoptera Family: Gyrinidae Genus: Patrus
Collection specimenHolotype: - Male: Thailand Natural History Museum, Pathum Thani, Thailand.
Paratype: - 1 male: Aquatic Insect Collection, Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand.
- 2 females: Thailand Natural History Museum, Pathum Thani, Thailand; Enns Entomology Museum, University of Missouri, Columbia, Missouri, USA.
- 1 male: Enns Entomology Museum, University of Missouri, Columbia, Missouri, USA.
Morphology:Adult: -
Patrus nanensis is most similar to
P. apicalis and
P. subapicalis but can be distinguished by
Patrus nanensis male has the shorter protarsi, which are about 1/2 the protibia length, and the protarsomeres width gradually decreases apically. The aedeagus of
P. nanensis has the narrower and more needle-like apex of the median lobe as well as by the more narrowly rounded parameres than that
P. apicalis. Whereas the aedeagus of
P. subapicalis is considerably different from those of two species. Females of
P. nanensis can be distinguished from those of two species by the elytral glabrous region in
P. nanensis is relatively narrower, occupying 9/11 of the elytral width.
Figure
Dorsal habitus of Patrus nanensis female (Photo: Benjamart Suksai).
Habitat: -
Patrus nanensis is currently known from only one high-elevation stream in Khun Sathan National Park, Nan Province, Thailand.
Distribution:
- Nan Province: Khun Sathan National Park.
Work cited:
- Suksai, B., Gustafson, G.T., Sites, R.W. and Sangpradub, N. 2021. Review of the
Patrus landaisi species group from Thailand with description of three new species (Coleoptera, Gyrinidae).
Zootaxa 4991(3): 561–591.
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