Tribasodites hubeiensis, 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 : 108

Tribasodites hubeiensis sp. nov.

( Figs 1 , 12A–C, 13A)

Type locality. China, Hubei, Yichang Shi, Huanghua Xiang, Xingping Cun, Qingrenquan Dong.

Type material. HOLOTYPE: J, ‘ Qingrenquan Dong (180 m), Xingping Cun , Huanghua Xiang , Yichang Shi, [Hubei, CHINA], 24.vi.2010, Hiroshi Miyama’ (NSMT) . PARATYPES: 2 ♀♀, same label data as holotype (NSMT) ; 1 J, ‘Shikumen Dong, Songping Cun, Yezhou Zh., Jianshi Xian, [Hubei, CHINA], 26.vi.2010, Hiroshi Miyama’ (NSMT) .

Diagnosis. Male: vertex simple, lacking modification; antennomeres VIII–XI modified; each eye composed of about 50 facets; pronotum with distinct lateral spines; metaventrite raised above metacoxae to form ridges, with dense setae along ridges; 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. 1A ) reddish brown, mouth parts, antennae and tarsi paler; BL 2.97 mm. HL 0.59–0.60 mm, HW 0.62–0.63 mm; median longitudinal carina extending from base to level of eyes; each eye composed of about 50 facets; antennomeres VIII–IX modified ( Fig. 1B ). Pronotum slightly wider than long, PL 0.60–0.63 mm, PW 0.66–0.68 mm; with distinct discal and lateral spines. Elytra slightly wider than long, EL 0.90–0.91 mm, EW 0.94–0.95 mm; discal striae extending to apical 4/5 elytral length. Metaventrite ( Fig. 1C ) strongly raised above metacoxae, with pair of rows of dense setae; metacoxae and metatrochanters simple. Abdomen narrower than elytra, AL 0.85–0.86 mm, AW 0.88– 0.84 mm. Aedeagus ( Figs 1D, E ) asymmetric, length 0.66 mm.

Female. Similar to male in general; each eye with about 15 facets; antennae and metaventrite simple. Tergite VIII (Fig. 12A) and sternite VIII (Fig. 12B) transverse; width of genital complex excluding lateral arms (Fig. 12C) 0.12 mm. Measurements: BL 2.65 mm; HL 0.57–0.58 mm, HW 0.56–0.57 mm, PL 0.57–0.58 mm, PW 0.63–0.64 mm, EL 0.77–0.80 mm, EW 0.87–0.88 mm, AL 0.71–0.72 mm, AW 0.79–0. 82 mm.

Etymology. The new species is named after the province where the type locality lies; adjective.

Distribution. Central China: Hubei ( Fig. 13A ).

Figures

Fig. 1. Tribasodites hubeiensis 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).