Tribasodites cehengensis, Yin & Nomura & Li, 2015

Yin, Zi-Wei, Nomura, Shûhei & Li, Li-Zhen, 2015, Ten new species of cavernicolous Tribasodites from China and Thailand, and a list of East Asian cave-inhabiting Pselaphinae (Coleoptera: Staphylinidae), Acta Entomologica Musei Nationalis Pragae 55 (1), pp. 105-127 : 110-112

Tribasodites cehengensis sp. nov.

( Figs 3 , 12D–F, 13A)

Type locality. China, Guizhou, Ceheng Xian, Rongdu Zhen, Rongdu Cun, Hetou Dong.

Type material. HOLOTYPE: J, ‘ Hetou Dong, 1030 m, Rongdu Cun, Rongdu Zhen / Ceheng Xian, SW. GUIZHOU, 24-V-2006, M. Nakanishi’ (NSMT) . PARATYPES: 2 JJ, same label data as holotype (NSMT) ; 1 J 1 ♀, same label data, except ‘R. Oshitani’ (NSMT).

Diagnosis. Male: vertex simple, lacking modification; antennomeres VIII–XI modified; each eye composed of about 40 facets; pronotum with distinct small lateral spines; metaventrite raised above metacoxae to form humps, with dense setae at anterior half of the humps; aedeagus with apical portion of the median lobe split to two parts, the dorsal part much shorter than the ventral part. Female: each eye composed of about 15 facets; may be identified by the association with male.

Description. Male. Body ( Fig. 3A ) reddish brown, mouth parts, antennae and tarsi paler; BL 2.82–2.89 mm. HL 0.58–0.60 mm, HW 0.59–0.60 mm; median longitudinal carina extending from base to level of eyes; each eye composed of about 40 facets; antennomeres VIII–IX modified ( Fig. 3B ). Pronotum about as long as wide, PL 0.58–0.59 mm, PW 0.57–0.60 mm; with small discal and lateral spines. Elytra slightly wider than long, EL 0.85–0.86 mm, EW 0.89–0.90 mm; discal striae extending to apical 4/5 elytral length. Metaventrite ( Fig. 3C ) raised above metacoxae, with pair of short rows of dense setae; metacoxae and metatrochanters simple. Abdomen narrower than elytra, AL 0.78–0.87 mm, AW 0.80–0.82 mm. Aedeagus ( Figs 3D, E ) asymmetric, length 0.52 mm.

Female. Similar to male in general; each eye with about 15 facets; antennae and metaventrite simple. Tergite VIII (Fig. 12D) and sternite VIII (Fig. 12E) transverse; width of genital complex excluding lateral arms (Fig. 12F) 0.14 mm. Measurements: BL 2.73 mm; HL 0.58 mm, HW 0.58 mm, PL 0.61 mm, PW 0.58 mm, EL 0.78 mm, EW 0.86, AL 0.76 mm, AW 0.81 mm.

Etymology. The new species is named after its type locality, Ceheng Xian; adjective.

Distribution. Southwest China: Guizhou ( Fig. 13A ).

Figures

Fig. 3. Tribasodites cehengensis sp. nov., male. A – habitus. B – left antenna. C – meso- and metaventrite. D – aedeagus, in lateral view. E – aedeagus, in ventral view. Scales: A = 1.0 mm; C = 0.5 mm; B, D, E = 0.2 mm.

Fig. 13. Distribution of the Tribasodites bedosae species-group in China (A) and Thailand (B).