Lathrobium acutissimum
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Ordo: Coleoptera
Familia: Staphylinidae
Genus: Lathrobium
Name
Lathrobium acutissimum Peng, Li & Zhao sp. n. – Wikispecies link – ZooBank link – Pensoft Profile
Type locality
Labahe Natural Reserve, Sichuan Province, Southwest China
Type material (5 ♂♂, 4 ♀♀)
Holotype: ♂, labeled ‘CHINA: Sichuan Prov. / Tianquan County / Labahe N. R. / 30°09'N, 102°26'E / 30.vii.2006, alt. 2,000 m / Hu & Tang leg.’. Paratypes: 4 ♂♂, 2 ♀♀, same label data as holotype; 2 ♀♀, same label data, except ‘29.v.2006’.
Description
Measurements and ratios:BL 8.12–10.00, FL 3.78–4.11, HL 1.18–1.26, HW 1.26–1.31, PL 1.52–1.63, PW 1.30–1.41, EL 0.98–1.05, HL/HW 0.93–0.96, HW/PW 0.94–0.97, HL/PL 0.76–0.79, PL/PW 1.16–1.17, EL/PL 0.64–0.67.
Habitus as in Fig. 1A. Body brown with paler apex, legs brown to light brown, antennae brown to reddish brown.
Head subquadrate (HL/HW 0.93–0.96); punctation coarse and dense; interstices with shallow and netlike microsculpture; eyes small, approximately 1/5–1/4 of length of postocular region in dorsal view.
Pronotum nearly parallel-sided; punctation sparser than that of head; impunctate midline narrow; interstices shining without microsculpture.
Elytra with punctation denser than that of pronotum and well defined; hind wings reduced.
Abdomen with dense punctation; interstices with very shallow, transversely striate microsculpture.
Male. Sternite VII (Fig. 2A) with short, darkish setae in U-shaped posterio-median impression; sternite VIII (Fig. 2B) with triangular, symmetrical emargination and short, darkish setae in shallow impression; sternite IX (Fig. 2C) long and nearly symmetrical; aedeagus (Fig. 2D, 2E) with very slender, ventral process.
Female. Posterior margin of tergite VIII (Fig. 2F) somewhat convex; sternite VIII (Fig. 2G) slightly longer than that of male, posterior margin broadly convex; tergite X (Fig. 2H) not acute basally and not reaching anterior margin of tergite IX (Fig. 2H).
Distribution
Southwest China: Sichuan.
Etymology
The specific epithet (Latin, adjective: sharp) alludes to the apical margin of the male sternite IX.
Remarks
It resembles Lathrobium lijiangense Watanabe & Xiao, 1997 from Yunnan in having a similar shape of the male sternite VII. The new species can be readily distinguished from these species by the male sternite VIII with a triangular emargination at the apical margin and by the aedeagus with a much longer ventral process. In Lathrobium lijiangense, the male sternite VIII has a semi-elliptical emargination at the apical margin and the ventral process of the aedeagus is short.
Original Description
- Peng, Z; Li, L; Zhao, M; 2012: Three new species of Lathrobium Gravenhorst (Coleoptera, Staphylinidae, Paederinae) from Sichuan, Southwest China ZooKeys, 205: 33-44. doi
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