Pselaphodes elongatus, 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 : 465-466

Pselaphodes elongatus sp. nov.

( Figs 7B , 9 )

Type material (17 exs). HOLOTYPE: ♁, CHINA: ‘ China: Yunnan, Daweishan N. R., 22°54.317′N, 103°41.961′E, 2124 m, 28.x.2016, Huang & Wang leg. [ṅṁ† DZƜŊ ḨOiṖữ]’ ( SNUC). PARATYPES: CHINA: 3 ♁♁ 13 ♀♀, same label data as the holotype ( SNUC).

Diagnosis of male. Length 2.51–2.52 mm; antennomeres IX–XI strongly elongate, antennomere XI strongly narrowed near base; metaventral processes broad, and apically narrowed; metacoxa with short blunt ventral projection.

Description. Male ( Fig. 7B ). Body reddish brown, BL 2.51–2.52 mm. Head as long as wide, HL 0.48–0.50 mm, HW 0.49–0.50 mm; each eye composed of about 33 facets; with well-developed ocular canthus.Antennomeres IX–XI ( Fig. 9A ) forming distinct club, distinctly elongate and enlarged, antennomere XI strongly narrowed near base. Pronotum ( Fig. 9B ) slightly wider than long, PL 0.47–0.49 mm, PW 0.50–0.51 mm, with lateral margins rounded at apical third. Elytra wider than long, EL 0.78–0.80 mm, EW 0.96–0.97 mm. Metaventral processes ( Fig. 9C ) broad, with narrowed apex. Protrochanter with small ventral spine, profemur ( Fig. 9D ) strongly broadened, with acute ventral spine; protibia ( Fig. 9E ) with distinct, blunt projection at apex; mesotrochanter with thin ventral spine, mesofemur ( Fig. 9F ) simple; metacoxa ( Fig. 9G ) with short blunt ventral projection. Abdomen broad at base and narrowed apically, AL 0.74–0.77 mm, AW 0.89–0.97 mm. Sternite IX ( Fig. 9H ) semi-membranous. Length of aedeagus ( Figs 9 I–K) 0.56 mm; median lobe broad and asymmetric, endophalluscomposed of one elongate, curved and one short sclerite.

Female. Each eye composed of about 25 facets; antennae and legs simple. Measurements: BL 2.45–2.74 mm, HL 0.44–0.60 mm, HW 0.41–0.55 mm, PL 0.44–0.49 mm, PW 0.44–0.50 mm, EL 0.62–0.69 mm, EW 0.95–0.98 mm, AL 0.95–0.96 mm, AW 1.04–1.08 mm.

Comparative notes. Males of the new species can be readily separated from all known congeners by the strongly elongate and enlarged antennal clubs, the broad metaventral processes with narrowed apex, strongly broadened profemur, metacoxa with short blunt ventral projection, and unique structure of the aedeagus.

Etymology. The specific epithet is Latin adjective referring to the elongate antennal clubs in the male of the new species.

Distribution. China: Yunnan.

Figures

Fig. 7. Dorsal habitus of Pselaphodes males. A – P. daweishanussp. nov; B – P. elongatus sp. nov. Scale bar: 1 mm.

Fig. 9. Male diagnostic features of Pselaphodes elongatus 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 – metacoxa, 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.