Tribasodites kawadai, 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 : 118

Tribasodites kawadai sp. nov.

( Figs 8 , 12P–R, 13A)

Type locality. China, Guangxi, Leye Xian, Bagao, Tiankeng Dong.

Type material. HOLOTYPE: J, ‘ Tiankeng Dong (cave), Bagao , Leye Xian, [NW-Guangxi, CHINA] / {locality repeated in Chinese character} 12-13.ix.2004, A. Kawada’ (NSMT) . PARATYPE: 1 ♀, same label as holotype (NSMT).

Diagnosis. Male: vertex simple, lacking modification; antennomeres VIII–XI modified; each eye composed of about 15 facets; pronotum lacking lateral spines; metaventrite slightly raised above metacoxae to form humps, with short row of dense setae on each hump; aedeagus with apical portion of the median lobe split to two parts, dorsal part as long as ventral part. Female: Each eye with about 8 facets; may be identified by the association with male.

Description. Male. Body ( Fig. 8A ) reddish brown, mouth parts, antennae and tarsi paler; BL 2.96 mm. HL 0.59 mm, HW 0.59 mm; median longitudinal carina vague, extending from base to level of eyes; each eye composed of about 15 facets; antennomeres VIII–IX modified ( Fig. 8B ). Pronotum slightly longer than wide, PL 0.67 mm, PW 0.64 mm; lacking discal and lateral spines. Elytra slightly wider than long, EL 0.86 mm, EW 0.92 mm; discal striae extending to more than half elytral length. Metaventrite ( Fig. 8C ) slightly raised above metacoxae, with pair of short rows of dense setae; metacoxae and metatrochanters simple. Abdomen narrower than elytra, AL 0.84 mm, AW 0.94 mm. Aedeagus ( Figs 8D, E ) asymmetric, length 0.81 mm.

Female. Similar to male in general; each eye with about 8 facets; antennae and metaventrite simple. Tergite VIII (Fig. 12P) and sternite VIII (Fig. 12Q) transverse; width of genital complex excluding lateral arms (Fig. 12R) 0.17 mm. Measurements: BL 2.99 mm; HL 0.64 mm, HW 0.60 mm, PL 0.67 mm, PW 0.62 mm, EL 0.82 mm, EW 0.92 mm, AL 0.86 mm, AW 0.86 mm.

Etymology. The new species is named after A. Kawada, collector of the holotype.

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

Figures

Fig.8. Tribasodites kawadai 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).