Pselaphodes lianghongbini, Yin, 2019

Yin, Zi-Wei, 2019, Two new species and new records of the Pselaphodes - complex of genera from China (Coleoptera: Staphylinidae: Pselaphinae), Revue suisse de Zoologie 126 (2), pp. 197-202 : 200

Pselaphodes lianghongbini sp. nov.

Figs 1B , 3 A-L

Type material: Holotype; IOZ(E)2058749; ♂; CHINA, ‘MDOiṞBọø, ṈLJĀẈẌď 4.5 km ½, 2016. VI.7 D, 2670 m, N° 27.8202, E° 91.7576, Ẓợ ^: ṃừ ǿ (China: Xizang, Cuona County, Le Township , 4.5 km of Bian-Fang-Liu-Lian Highway, Hong-Bin Liang leg.)’ ( IZCAS) . – Paratypes; IOZ(E)2058745 to 2058747, 2058751; 4 ♀♀; CHINA, same label data as holotype ( IZCAS) .

Type locality: Le Menba Ethnic Township, Cuona County, Xizang, China.

Diagnosis: Male: Body length about 3.6 mm. Antennomere 9 with disc-shaped process near apex, antennomere 10 with round projection at base. Metaventral processes short and broad, narrowed apicad and with round apex. Profemora robust, with large triangular ventral spine, protibiae with distinct apical projection; mesotrochanters with small ventral spine, mesotibiae with slender spur at apex; metacoxae with blunt ventral projection. Median lobe of aedeagus almost symmetrical, narrowing apically and with round apex; parameres with roundly broadened apical half; endophallus comprised of two sclerites. Female: identifiable only by association with male.

Description: Male ( Fig. 1B ). Body reddish brown, body length 3.63 mm. Head elongate, length from anterior clypeal margin to base 0.73 mm, width across eyes 0.44 mm; each eye composed of about 30 facets; with short ocular canthus. Antennomeres 9-11 forming distinct club ( Fig. 3A ); antennomere 9 with disc-shaped process near apex, antennomere 10 constricted at base, with round, lamina-like projection at base. Maxillary palpomeres 2-4 strongly protuberant and stemmed on lateral margin. Pronotum ( Fig. 3B ) longer than wide, length along midline 0.73 mm, maximum width 0.66 mm, roundly angulate at anterolateral margins, narrowing toward apex at apical 2/5. Elytra wider than long, length along suture 1.0 mm, maximum width 1.34 mm. Metaventral processes ( Fig. 3C ) short and broad, roundly narrowed at apex; with pair of short tubercles above metacoxae. Profemora ( Fig. 3D ) thickened, with large triangular ventral spine, protibiae ( Fig. 3E ) with large projection at apex; mesotrochanters ( Fig. 3F ) with small ventral tubercle; mesotibiae ( Fig. 3G ) with slender spur at apex; metacoxae ( Fig. 3H ) with blunt ventral projection. Abdomen broad at base and narrowing apically, length of dorsally visible part along midline 1.17 mm, maximum width 1.32 mm. Semi-membranous sternite IX ( Fig. 3I ) nearly oval. Length of aedeagus ( Figs 3 J-L) 0.67 mm; median lobe almost symmetric, narrowing apically and with round apex; parameres narrowed at base and roundly broadened at apical half; endophallus composed of one elongate and one shorter sclerites.

Female. Each eye composed of about 25 facets; antennae simple; mesotrochanters with large, triangular ventral spine; metaventral processes much shorter, subtriangular; lacking tubercles above metacoxae. Measurements (as for male): body length 3.61-3.88 mm, length/width of head 0.74-0.78/ 0.59-0.63 mm, length/width of pronotum 0.74-0.75/ 0.64-0.68 mm, length/width of elytra 0.90- 0.96/ 1.35-1.38 mm, length/width of abdomen 1.22- 1.40/ 1.46-1.55 mm.

Comparative notes: Based on the structure of the modification of the male antennal club and the endophallus of the aedeagus, the new species is placed as a member of the P. bagmatius species-group containing 15 species from Nepal (termed in Huang & Yin, 2019). Pselaphodes lianghongbini can be readily separated from all Nepalese species by a unique combination of the structure of the antennal club, spination of the legs, form of the metaventral processes, as well as the almost symmetric aedeagus.

Distribution: China: Xizang.

Etymology: The specific epithet is dedicated to Dr Hong-Bin Liang, collector of the type series of the new species.

Figures

Fig 1. Male habitus of Labomimus consimilis sp. nov. (A) and Pselaphodes lianghongbini sp. nov. (B). Scale bars: 1 mm.

Fig 3. Male diagnostic features of Pselaphodes lianghongbini sp. nov. (A) Antennal club. (B) Pronotum. (C) Metaventral process, lateral. (D) Protrochanter and profemur. (E) Apex of protibia. (F) Mesotrochanter and mesofemur. (G) Apex of mesotibia. (H) Metacoxa, metatrochanter and metafemur. (I) Sternite IX. (J-L) Aedeagus, dorsal (J), lateral (K), and ventral (L). Scale bars: 0.3 mm in A-D, F, H; 0.2 mm in J-L; 0.1 mm in E, G, I.