Labomimus quadratithorax, Yin & Li, 2013

Yin, Zi-Wei & Li, Li-Zhen, 2013, Five new species of the genera Labomimus and Linan from Guangxi, South China (Coleoptera: Staphylinidae: Pselaphinae), Acta Entomologica Musei Nationalis Pragae 53 (1), pp. 141-153 : 143-145

Labomimus quadratithorax sp. nov.

( Figs 1B , 3 , 8B )

Type locality. China, Guangxi Province, Lingui County, Huaping Natural Reserve, An-Jiang-Ping, 1400–1700 m a.s.l., 25°35′46″N, 109°55′41″E.

Type material. HOLOTYPE: J, labeled ‘ CHINA: Guangxi Prov. / Lingui County / Huaping, Anjiangping / 14.vii.2011, 1400–1700 m / Zhong Peng leg. // HOLOTYPE (red) / Labomimus quadratithorax / sp. n., Yin & Li / det. 2012, SNUC’.

Diagnosis. Reddish brown; medium-sized; postgenae strongly narrowed posteriorly; antennomeres IX–XI elongate and enlarged; pronotum nearly quadrate; with long metaventral processes; metatrochanter spinose; aedeagus with asymmetric median lobe.

Description. Male ( Fig. 1B ). Length 2.73. Head as long as wide, HL 0.68, HW 0.67; eyes each composed of about 20 facets. Antennal club as in Fig. 3A . Pronotum ( Fig. 3B ) as long as wide, PL 0.61, PW 0.61, with lateral margins slightly rounded laterally. Elytra wider than long, EL 0.68, EW 1.06. Metaventral processes long, broadened apically ( Fig. 3C ). Protrochanters, profemora ( Fig. 3D ), mesotrochanters and mesofemora ( Fig. 3E ) simple, metatrochanters ( Fig. 3F ) with short blunt ventral spine. Abdomen large, AL 0.76, AW 1.07. Sternite IX as in Fig. 3G . Aedeagus length 0.50; median lobe asymmetric at apex ( Figs. 3H–J ).

Female. Unknown.

Comparative notes. This species can be separated from all other congeners by the uniquely constricted postgenae and the quadrate pronotum.

Etymology. The new species is named from a combination of the Latin stem, ‘ quadrati ’ and Greek word ‘ thorax ’, referring to the unique pronotal shape of the new species. Noun in apposition.

Biology. The single specimen was collected by sifting leaf litter along a road to the peak in a broad-leaved forest ( Fig. 8B ).

Distribution. South China: Guangxi.

Figures

Fig. 1. Male habitus of Labomimus spp. A – L. maoershanus sp. nov; B – L. quadratithorax sp. nov. Scales: 1 mm.

Fig. 3. Diagnostic features of male Labomimus quadratithorax sp. nov.A – antennal club; B – pronotum; C – metaventral process, lateral view; D – protrochanter and profemur; E – mesotrochanter and mesofemur; F – metatrochanter and metafemur; G – sternite IX; H – aedeagus, dorsal view; I – same, lateral view; J – same, ventral view. Scales: A, B, D, E, F = 0.3 mm; H, I, J = 0.2 mm; C, G = 0.1 mm.

Fig. 8. Habitats of the new species.A – Maoershan Mt., 2000 m; B – Huaping N.R., 1700 m; C – Lianhuashan Mt., 1100 m; D – Shengtangshan Mt., 1700 m.