Pselaphodes jendeki, Yin & Li, 2021

Yin, Zi-Wei & Li, Ning, 2021, Eight new species and additional records of the Pselaphodes complex from Laos and Vietnam, with a key to known species (Coleoptera: Staphylinidae: Pselaphinae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 61 (1), pp. 35-53 : 44-45

Pselaphodes jendeki sp. nov.

( Figs 7A , 8 )

Type material (8 specimens). HOLOTYPE: VIETNAM: LÀO CAI: ♂, ‘VIETNAM N 22°20′N, 103°50′E, SAPA ( Lao Cai ) 25.5- 10.6.1991, leg. E. Jendek’ ( MHNG) . PARATYPES: VIETNAM: LÀO CAI : 7 ♂♂, same label data as for holotype ( MHNG, SNUC) .

Diagnosis. Male length 3.80–3.85 mm. antennomeres 9–11 each elongate, almost simple, antennomere 9 with small disc-like process near apex. Protrochanter with acute ventral spine, profemur with sharp spine at middle; mesotrochanter with acute ventral spine, mesotibia with small, blunt apical tubercle. Horn-like metaventral processes considerably short, apices truncate and bent downwards. Median lobe of aedeagus asymmetric; parameres short; endophallus composed of three sclerites. Female unknow.

Description. Male ( Fig. 7A ). Body length 3.80–3.85 mm. Head slightly longer than wide, HL 0.68–0.73 mm, HW 0.68–0.70 mm; eyes prominent, each composed of about 40 facets. Antennomeres 2–8 each moniliform, antennomeres 9–11 ( Fig. 8A ) each strongly elongate and enlarged, antennomere 9 with small disc-like structure near apex. Pronotum ( Fig. 8B ) approximately as long as wide, PL 0.65–0.68 mm, PW 0.62–0.67 mm, sides narrowing anteriorly at apical two-fifths. Elytra broader than long, EL 1.10–1.20 mm, EW 1.30–1.40 mm. Horn-like metaventral processes ( Fig. 8C ) short and broad in lateral view, apically bifid, upper apex acute, apex truncate.Protrochanter ( Fig. 8D ) with thin, acute ventral spine; profemur with sharp ventral spine at middle; mesotrochanter ( Fig. 8E ) with acute ventral spine, mesofemur simple, mesotibia ( Fig. 8F ) with small apical tubercle; metatrochanters and metafemur ( Fig. 8G ) simple. Abdomen broad at base and narrowed apically, AL 1.15–1.20 mm, AW 1.30 mm. Sternite 7 (IX) ( Fig. 8H ) hemi-membranous. Aedeagus ( Figs 8I –E ) 0.75 mm long, median lobe asymmetric dorso-ventrally, narrowing apically and curved rightwards at apex in dorsal view; parameres much shorter than median lobe, each with three apical setae, endophallus composed of one triangle and two slightly curved, elongate sclerites.

Female. Unknown.

Comparative notes. This species belongs to the P. tianmuensis species group whose males share almost simple antennal clubs except for antennomere 9 which has a disc-like process near the apex. The new species may be readily separated from allied species by short and truncate horn-like metaventral processes, unique configuration of the aedeagus, as well as by its distribution.

Etymology. The new species is named after the Slovak entomologist Eduard Jendek, collector of the holotype.

Distribution. Vietnam: Lào Cai.

Figures

Fig. 7. Dorsal habitus of Pselaphodes males. A – P. jendeki sp. nov.; B – P. nongfa sp. nov. Scale bars: 1 mm.

Fig. 8. Male diagnostic features of Pselaphodes jendeki sp. nov.A – left antennal club, in dorsal view; B – pronotum; C – metaventral process, in lateral view; D – protrochanter and profemur; E – mesotrochanter and mesofemur; F – apex of mesotibia; G – metatrochanter and metafemur; H – sternite 7 (IX); I–K – aedeagus, in dorsal (I), lateral (J), and ventral (K) view. Scale bars: 0.3 mm in A, B, D, E, G; 0.2 mm in C, I, J, K; 0.1 mm in H; 0.05 mm in F.