Tribasodites bama, 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 : 116-117

Tribasodites bama sp. nov.

( Figs 7 , 12M–O, 13A)

Type locality. China, Guangxi, Bama Xian, Jiabao, Jiabao Dong.

Type material. HOLOTYPE: J, ‘ Jiabao Dong cave , Jiabao, Bama Xian , [Guizhou, China], {locality repeated in Chinese character} 6.ix.1997, T. Kishimoto’ (NSMT) . PARATYPES: 3 JJ 3 ♀♀, same label data as holotype (NSMT) ; 2 ♀♀, same label data, except ’ 10.ix.1997, Yoshiaki Noshikawa lg.’ (NSMT); 2 ♀♀, same label data, except ’ 21-IX-1998, Y. Nishikawa’ (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 to form short ridges, covered with short, dense setae along ridges; aedeagus with apical portion of the median lobe split to two parts, dorsal part much shorter than ventral part. Female: Each eye with about 10 facets; may be identified by the association with male.

Description. Male. Body ( Fig. 7A ) reddish brown, mouth parts, antennae and tarsi paler; BL 2.81–2.86 mm. HL 0.59–0.60 mm, HW 0.55–0.57 mm; median longitudinal carina extending from base to level of eyes; each eye composed of about 45 facets; antennomeres VIII–IX modified ( Fig. 7B ). Pronotum about as long as wide, PL 0.61–0.62 mm, PW 0.58–0.59 mm; with small discal and lateral spines. Elytra slightly wider than long, EL 0.86–0.88 mm, EW 0.92–0.93 mm; discal striae extending to apical 2/3 elytral length. Metaventrite ( Fig. 7C ) strongly raised above metacoxae, with pair of rows of dense setae; metacoxae and metatrochanters simple. Abdomen narrower than elytra, AL 0.73–0.78 mm, AW 0.78–0.79 mm. Aedeagus ( Figs 7D, E ) asymmetric, length 0.56 mm.

Female. Similar to male in general; each eye with about 10 facets; antennae and metaventrite simple. Tergite VIII (Fig. 12M) and sternite VIII (Fig. 12N) transverse; width of genital complex excluding lateral arms (Fig. 12O) 0.14 mm. Measurements: BL 2.70–2.78 mm; HL 0.59–0.60 mm, HW 0.57–0.59 mm, PL 0.57–0.63 mm, PW 0.59–0.63 mm, EL 0.81–0.86 mm, EW 0.89–0.91 mm, AL 0.69–0.73 mm, AW 0.81–0.84 mm.

Etymology. The species is named after the type locality, Bama Xian ; noun in apposition.

Distribution. South China: Guangxi ( Fig. 13A ).

Figures

Fig. 7. Tribasodites bama 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).