Pselaphodes antennarius, 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 : 461-462

Pselaphodes antennarius sp. nov.

( Figs 4A , 5 )

Type material ( 1 ex.). HOLOTYPE: ♁, CHINA: ‘ China: N. Guizhou, Daozhen Co. ( AEA ẆȒẇaeẇŊàR), Dashahe († ÒȐ), 29°10′12″N, 107°33′36″E, mixed leaf litter, sifted, 1730 m, 07.vii.2015, Jiang, Peng, Tu & Zhou leg.’ ( SNUC).

Diagnosis of male. Length 2.88 mm; antennomere VII slightly broadened mesally, antennomere IX broadly triangular, with large cavity on upper surface; antennomere X with large lamina-like projection at base; metaventral processes short, apically narrowed; protrochanter and profemur each with one distinct ventral spine, mesotrochanter with multiple protuberances.

Description. Male ( Fig. 4A ). Body reddish brown, BL 2.88 mm. Head slightly longer than wide, HL 0.63 mm, HW 0.60 mm; each eye composed of about 35 facets. Antennomeres IX–XI ( Fig. 5A ) forming distinct club, antennomere VII slightly broadened mesally, antennomere IX broadly triangular, with large cavity on upper surface, antennomere Xwith large lamina-like projection at base. Pronotum ( Fig. 5B ) as long as wide, PL 0.55 mm, PW 0.55 mm, constricted at apical half. Elytra wider than long, EL 0.80 mm, EW 1.15 mm. Metaventral horn-like processes ( Fig. 5C ) short, apically narrowed. Protrochanter with acute ventral spine, profemur with distinct ventral spine ( Fig. 5D ); mesotrochanter ( Fig. 5E ) with multiple protuberances; metatrochanter and metafemur ( Fig. 5F ) simple.Abdomen broad at base and narrowed apically, AL 0.90 mm, AW 1.13 mm. Sternite IX ( Fig. 5G ) semi-membranous. Length of aedeagus ( Figs 5 H–J) 0.43 mm; median lobe asymmetric, parameres apically narrowed, endophallus composed of one elongate and two short sclerites.

Female. Unknown.

Comparative notes. The new species is placed as a member of the P. walkeri species group based on the asymmetrical male antennomere VII. The unique form of antennomere IX and antennomere X, short metaventral processes, multiple protuberances of the mesotrochanter, and structure of the aedeagus readily separate P. antennarius from all other similar congeners.

Etymology. The specific epithet is Latin adjective referring to the strongly modified antennomeres IX–X in the male of the new species.

Distribution. China: Guizhou.

Figures

Fig. 4. Dorsal habitus of Pselaphodes males. A – P. antennarius sp. nov; B – P. baoxingensissp. nov. Scale bar: 1 mm.

Fig. 5. Male diagnostic features of Pselaphodes antennarius sp. nov. A – antennal club; B – pronotum; C – metaventral process, in lateral view; D – protrochanter and profemur; E – mesotrochanter and mesofemur; F – metatrochanter and metafemur; G – sternite IX; H–J – aedeagus, in dorsal (H), lateral (I), and ventral (J) view. Scale bar: 0.3 mm in A–B, D–F; 0.2 mm in C, H–J; 0.1 mm in G.