Tribasodites xingyiensis, 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 : 115-116

Tribasodites xingyiensis sp. nov.

( Figs 6 , 12J–L, 13A)

Type locality. China, Guizhou, Xing’yi Shi, Jingnan Zhen, Shanjiao Cun, Feilong Dong.

Type material. HOLOTYPE: J, ‘ Feilong Dong, 1400 m alt., Shanjiao Cun, Jingnan Zhen , Xing’yi Shi, SW. Guizhou, 25-V-2006, M. Nakanishi’ (NSMT) . PARATYPES: 1 ♀, same label data as holotype, except ‘ H. Oshitani’ (NSMT) ; 2JJ ‘Yemao Dong, 1820 m alt., Lukan Cun, Qishe Zhen , Xing’yi Shi,SW. GUIZHOU, 26-V-2006, M.Nakanishi’ (NSMT) .

Diagnosis. Male: vertex simple, lacking modification; antennomeres VIII–XI modified; each eye composed of about 45 facets; pronotum with small lateral spines; metaventrite slightly raised above metacoxae, sparsely covered with long setae; aedeagus with apical portion of the median lobe split to two parts, dorsal part much shorter than ventral part. Female: Each eye with about 15 facets; may be identified by the association with male.

Description. Male. Body ( Fig. 6A ) reddish brown, mouth parts, antennae and tarsi paler; BL 2.76–2.80 mm. HL 0.59–0.64 mm, HW 0.61–0.63 mm; median longitudinal carina extending from base to level of eyes; each eye composed of about 45 facets; antennomeres VIII–IX modified ( Fig. 6B ). Pronotum about as long as wide, PL 0.57–0.59 mm, PW 0.58–0.60 mm; with small discal and lateral spines. Elytra slightly wider than long, EL 0.86–0.88 mm, EW 0.94–0.97 mm; discal striae extending to apical 4/5 elytral length. Metaventrite ( Fig. 6C ) raised above metacoxae, only with sparse setae; metacoxae simple, metatrochanters protuberant ventrally and with setose tuft. Abdomen narrower than elytra, AL 0.71–0.72 mm, AW 0.80–0.83 mm. Aedeagus ( Figs 6D, 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. 12J) and sternite VIII (Fig. 12K) transverse; width of genital complex excluding lateral arms (Fig. 12L) 0.17 mm. Measurements: BL 2.79 mm; HL 0.59 mm, HW 0.60 mm, PL 0.59 mm, PW 0.59 mm, EL 0.79 mm, EW 0.89 mm, AL 0.82 mm, AW 0.83 mm.

Etymology. The new species is named after the type locality, Xing’yi City; adjective.

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

Figures

Fig.6.Tribasodites xingyiensis 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).