Tribasodites abnormalis, 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 : 108-110

Tribasodites abnormalis sp. nov.

( Figs 2 , 13A )

Type locality. China, Guizhou, Libo Xian, Wengang X., Liangzhaixin, Bonong Dong.

Type material. HOLOTYPE: J, ‘ Bonong Dong Cave (740 m), Liangzhaixin , Wengang X., Libo Xian, [Guizhou, CHINA] / {locality repeated in Chinese character} 31.x.2000, T. Kishimoto lg.’ (NSMT).

Diagnosis. Male: vertex modified, covered with patches of dense setae; antennomeres VIII–XI simple; each eye composed of about 25 facets; pronotum lacking lateral spines; metaventrite raised above metacoxae to form ridges, setae mostly dense at posterior portion of the ridges; aedeagus with apical portion of the median lobe not split to two parts.

Description. Male. Body ( Fig. 2A ) reddish brown, mouth parts, antennae and tarsi paler; BL 2.93 mm. HL 0.58 mm, HW 0.59 mm; median longitudinal carina extending from base to level of eyes; each eye composed of about 25 facets; antennomeres VIII–IX simple ( Fig. 2B ). Pronotum about as long as wide, PL 0.62 mm, PW 0.60 mm; lacking discal and lateral spines. Elytra slightly wider than long, EL 0.84 mm, EW 0.89 mm; discal striae short, extending through 1/3 of elytral length. Metaventrite ( Fig. 2C ) raised above metacoxae, with longitudinal carinae covered with dense setae; metacoxae and metatrochanters simple. Abdomen narrower than elytra, AL 0.89 mm, AW 0.82 mm. Aedeagus ( Figs 2D, E ) asymmetric, length 0.56 mm. Female. Unknown.

Etymology. The species epithet refers to the simple male antennae, a unique feature within the group; adjective.

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

Figures

Fig.2. Tribasodites abnormalis 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).