Pselaphodes songxiaobini, Huang & Li & Yin, 2018

Huang, Meng-Chi, Li, Li-Zhen & Yin, Zi-Wei, 2018, Eleven new species and a new country record of Pselaphodes (Coleoptera: Staphylinidae: Pselaphinae) from China, with a revised checklist of world species, Acta Entomologica Musei Nationalis Pragae 58 (2), pp. 457-478 : 473-475

Pselaphodes songxiaobini sp. nov.

( Figs 16A , 17 )

Type material (5 exs). HOLOTYPE: ♁, CHINA: ‘ China: Xizang, near Bomi County, 2735 m, 29°52′21.95″N, 95°42′15.26″E, 12.iii.2017, X.-B. Song leg. [ϕḄMDǾḾR]’ ( SNUC). PARATYPES: CHINA: 4♀♀, same label data as the holotype ( SNUC).

Diagnosis of male. Length 2.92 mm; antennomere IX with large projection at apex, antennomere X with large projection at base; metaventral processes long and slender, expanded apically; protibia with distinct projection at apex; metacoxa with long curved ventral projection.

Description. Male ( Fig. 16A ). Body reddish brown, BL 2.92 mm. Head longer than wide, HL 0.63 mm, HW 0.57 mm; each eye composed of about 40 facets; with well-developed ocular canthus. Antennomeres IX–XI forming ( Fig. 17A ) distinct club, antennomere IX with large projection at apex, antennomere X with large projection at base. Pronotum ( Fig. 17B ) wider than long, PL 0.58 mm, PW 0.64 mm, angularly expanded at anterolateral margins. Elytra wider than long, EL 0.83 mm, EW 1.13 mm. Metaventral processes ( Fig. 17C ) long and slender, expanded apically. Protrochanter and profemur ( Fig. 17D ) simple; protibia ( Fig. 17E ) with distinct projection at apex; mesotrochanter and mesofemur ( Fig. 17F ) simple; metatrochanter ( Fig. 17G ) with long curved ventral projection.Abdomen broad at base and narrowed apically, AL 0.88 mm, AW 1.13 mm. Sternite IX ( Fig. 17H ) semi-membranous. Length of aedeagus ( Figs 17 I–K) 0.57 mm;median lobe strongly asymmetric, parameres elongate and slender, endophallus composed of two elongate and slender sclerites.

Female. Each eye composed of about 32 facets; antennae and legs simple. Measurements: BL 3.10–3.13 mm, HL 0.68–0.71 mm, HW 0.59–0.60 mm, PL 0.63–0.65 mm, PW 0.60–0.62 mm, EL 0.78–0.80 mm, EW 0.82–1.23 mm, AL 0.96–1.02 mm, AW 1.32–1.34 mm.

Comparative notes. The new species is most similar to P. bomiensis Yin, Li & Zhao, 2011 in sharing a similar general structure of antennomeres IX–X, and angulate pronotal anterolateral corners. Males of these two species can be readily separated at first glance by the mesofemur lacking a row of long setae along the ventral margin in the new species, the relatively more elongate antennomere X, the different shapes of the spines/protuberances of the legs, and structures of the aedeagus.

Etymology. The new species is named after our friend Xiao-Bin Song, collector of the holotype.

Distribution. China: Xizang.

Figures

Fig. 16. Dorsal habitus of Pselaphodes males. A – P. songxiaobini sp. nov; B – P. spinosus Champion, 1925. Scale bar: 1 mm.

Fig. 17. Male diagnostic features of Pselaphodes songxiaobini sp. nov. A – antennal club; B – pronotum; C – metaventral process, in lateral view; D – protrochanter and profemur; E – apex of protibia; F – mesotrochanter and mesofemur; G – mesocoxa, metatrochanter and metafemur; H – sternite IX; I–K – aedeagus, in dorsal (I), lateral (J), and ventral (K) view. Scale bar: 0.3 mm in A–B, D, F–G; 0.2 mm in C, I–K; 0.1 mm in E, H.