Tribasodites thailandicus, 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 : 121-122

Tribasodites thailandicus sp. nov.

( Figs 10 , 13B )

Type locality. Thailand, Chiang Mai, Chiang Dao, Ban Na Lao.

Type material. HOLOTYPE: J, ‘Pselaphien. Perte de Ban Na Lao, CHIAND DAO, THAILAND / {reverse side of the same label} P. Leclerc, THAI 85, 11.7.85’ (MHNG).Additional collection data in the MHNG notebook for Thai expedition in 1985, sample 89 on page 5: ‘N{orth} Doï Chang Dao, Ban Na Lao, alt. 800 m, at sight, P{hilippe} L{eclerc}’ (Cuccodoro, pers. comm.).

Diagnosis. Male: vertex simple, lacking modification; antennomeres VIII–XI modified; each eye composed of about 35 facets; pronotum with distinct lateral spines; metaventrite slightly raised above metacoxae, with short rows of setae at posterior portion; aedeagus with apical portion of the median lobe split to two parts, dorsal part shorter than ventral part.

Description. Male. Body ( Fig. 10A ) reddish brown, mouth parts, antennae and tarsi paler; BL 2.92 mm. HL 0.52 mm, HW 0.64 mm; median longitudinal carina distinct, extending from base to level of eyes; each eye composed of about 35 facets; antennomeres VIII–IX strongly modified ( Fig. 10B ). Pronotum wider than long, PL 0.63 mm, PW 0.71 mm; with distinct discal and lateral spines. Elytra slightly wider than long, EL 0.88 mm, EW 1.00 mm; discal striae extending to apical 2/3 elytral length. Metaventrite ( Fig. 10C ) slightly raised above metacoxae, with pair of rows of dense setae; metacoxae simple, metatrochanters protuberant at ventral margin. Abdomen narrower than elytra, AL 0.89 mm, AW 0.89 mm.Aedeagus ( Figs 10D, E ) asymmetric, length 0.78 mm.

Female. Unknown.

Etymology. The species epithet indicates the type locality of the new species; adjective.

Comments. The French ‘Perte de’ on the label, meaning ‘some kind of a hole where a stream disappears underneath the ground’, is not mentioned in the notebook (see above). This information was probably added by the collector when producing the label. Consequently, in combination with the morphology of this species, it is reasonable to assume that the male adult was collected in a cave.

Distribution. Thailand: Chiang Mai ( Fig. 13B ).

Figures

Fig. 10. Tribasodites thailandicus 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).