Lathrobium shengtangshanense Peng and Li

Peng, Zhong, Li, Li-Zhen & Zhao, Mei-Jun, 2012, New species of the genus Lathrobium Gravenhorst (Coleoptera: Staphylinidae: Paederinae) from Guangxi, South China, Zootaxa 3389, pp. 1-16 : 8-9

Lathrobium shengtangshanense Peng and Li , new species

( Figs. 1 D, 5)

Type material. (9 3, 5 ƤƤ). HOLOTYPE: 3, labelled ‘ CHINA: GUANGXI Prov. / Jinxiu County / Shengtangshan Mt. / 26.vii.2011, alt. 1,650–1,800 m / Jia-Yao Hu leg.’. PARATYPES: 7 3, 5 ƤƤ, same label data as holotype; 1 3, same, but ‘alt. 1,900 m / Zhong Peng leg.’.

Description. Measurements and ratios: BL 8.35–9.34, HL 1.18–1.24, HW 1.28–1.35, PL 1.67–1.74, PW 1.35–1.41, EL 1.05–1.17, HL/HW 0.91–0.92, HW/PW 0.95–0.97, HL/PL 0.71–0.74, PW/PL 0.80–0.82, EL/PL 0.63–0.67.

Habitus as in Fig. 1 D. Externally similar to L. dayaoshanense , except for the lighter average coloration, the somewhat smaller body size, the nearly parallel-sided pronotum and the narrower impunctate midline on the pronotum.

Male. Sternite VII ( Fig. 5 D) with short modified setae surrounding subtriangular medioapical impression, and with apical margin deeply concave; sternite VIII ( Fig. 5 E) with weak emargination and broad impression along middle, on either side of this impression with modified setae; sternite IX ( Fig. 5 F) asymmetric; aedeagus as in Fig. 5 G–5J.

Female. Apical margin of tergite VIII ( Fig. 5 A) angulate at middle; sternite VIII ( Fig. 5 B) distinctly oblong, much longer than that of male and distinctly produced apically; tergite IX ( Fig. 5 C) narrowly separated basally; tergite X elliptical, reaching basal margin of tergite IX.

Remarks. The new species is close to L. guizhouensis Chen, Li & Zhao, 2005 from Guizhou with which it shares the similar habitus ( Chen, Li & Zhao, 2005: 599, Fig. 1 ) and the male sternite VIII ( Chen, Li & Zhao, 2005: 599, Fig. 2 ). But the new species can be readily distinguished by the front part of the aedeagus studded with dense tubercles. In L. guizhouensis , the aedeagus ( Chen, Li & Zhao, 2005: 599, Fig. 3–5 ) is slender and lacks tubercles.

Distribution. South China (Guangxi: Shengtangshan Mountain).

Habitat. The adults were collected from the leaf litter of the forest floor by sifting.

Etymology. The species is named after its type locality.

Figures

FIGURE 1. Habitus of Lathrobium spp., A — L. dayaoshanense; B — L. maoershanense; C — L. proprium; D — L. shengtangshanense; E — L. zhangdinghengi; F — L. zhujianqingi. Scale bars: 1.0 mm.

FIGURE 2. Lathrobium dayaoshanense. A — female tergite VIII; B — female sternite VIII; C — female tergites IX – X. D — male sternite VII; E — male sternite VIII; F — male sternite IX; G, H — aedeagus in ventral view; I — aedeagus in lateral view. Scale bars: 0.5 mm.

FIGURE 3. Lathrobium maoershanense. A — female tergite VIII; B — female sternite VIII; C — female tergite IX – X. D — male sternite VII; E — male sternite VIII; F — male sternite IX; G, H — aedeagus in ventral view; I — aedeagus in lateral view. Scale bars: 0.5 mm.

FIGURE 4. Lathrobium proprium. A — male sternite VII; B — male sternite VIII; C — male sternite IX; D, E — aedeagus in ventral view; F — aedeagus in lateral view. Scale bars: 0.5 mm.

FIGURE 5. Lathrobium shengtangshanense. A — female tergite VIII; B — female sternite VIII; C — female tergites IX – X. D — male sternite VII; E — male sternite VIII; F — male sternite IX; G, H — aedeagus in ventral view; I — aedeagus in lateral view; J — the front part of the aedeagus, enlarged. Scale bars: A — I: 0.5 mm, J: 0.2 mm.