Pselaphodes symmetricus Huang & Yin, 2019, sp. nov.
Creators: name: Huang, Meng-Chi
name: Yin, Zi-Wei
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Pselaphodes
Pselaphodes symmetricus

description: Pselaphodes symmetricus sp. nov.
Figs 19B, 21 A-L
Type material (3 specimens): Holotype; MHNG- ENTO-44079; ♂; NEPAL, ‘ NEPAL: distr. Kathmandu: Phulcoki, 2500 m, 30.IV.84, Löbl - Smetana’. – Paratypes; MHNG-ENTO-44080; 1 ♀; NEPAL, same label data as holotype. – MHNG-ENTO-44081; 1 ♂; NEPAL, ‘ NEPAL (Prov. Bagmati), Gul Bhanjyang, 2600 m, 6.IV.81, Löbl & Smetana’ (both paratypes in MHNG).
Type locality: Nepal, Kathmandu District, Phulchoki Hill, 2500 m alt.
Diagnosis of males: Length 3.01-3.15 mm. Antennomeres 9 slightly concave on mesal surface, antennomeres 10 with large projection at base. Metaventral processes moderately long, with pair of small triangular projection in addition to elongate processes. Protrochanters with slender ventral spine, profemora with blunt ventral spine, protibiae with large spine at apex; mesotrochanters with acute ventral spine, mesotibiae with small projection at apex. Median lobe of aedeagus symmetric, narrowed at apex; parameres short and symmetric.
Description: Male (Fig. 19B). Body reddish brown, BL 3.01-3.15 mm. Head longer than wide, HL 0.62- 0.65 mm, HW 0.55-0.59 mm; each eye composed of about 40 facets. Antennomeres (Fig. 21A) 9-11 forming distinct club, antennomeres 10 with large projection at base. Pronotum (Fig. 21B) longer than wide, PL 0.61- 0.64 mm, PW 0.56-0.61 mm, rounded at anterolateral margins, strongly constricted at apical third. Elytra wider than long, EL 0.82-0.87 mm, EW 1.14-1.22 mm. Metaventral processes (Fig. 21C) moderately elongate, with pair of small triangular projection in addition to long processes. Protrochanters with slender ventral spine, profemora with blunt ventral spine (Fig. 21D), protibiae (Fig. 21E) with distinct spine at apex; mesotrochanters with acute ventral spine (Fig. 21F); mesotibiae with small projection at apex (Fig. 21G); metatrochanters and metafemora (Fig. 21H) simple. Abdomen broad at base and narrowing apically, AL 0.96-0.99 mm, AW 1.23-1.31 mm. Sternite IX semimembranous, shape as in Fig. 21I. Length of aedeagus (Figs 21 J-L) 0.59 mm; median lobe symmetric and stout, apex abruptly narrowed; parameres short, almost symmetric; endophallus composed of one long and one short sclerites.
Female. Each eye composed of about 22 facets; antennae simple. Measurements: BL 2.92 mm, HL 0.59 mm, HW 0.56 mm, PL 0.67 mm, PW 0.64 mm, EL 0.70 mm, EW 1.37 mm, AL 0.96 mm, AW 1.44 mm.
Distribution: Nepal, Bagmati.
Comparative notes: The new species is a member of the P. bagmatius species-group, and can be readily separated from all other congeners based on the more elongate antennomeres and elytra, the large basal projection of antennomeres 10 of the male, and the stout and symmetric median lobe of the aedeagus.
Etymology: The specific epithet refers to the symmetric form of the aedeagus of the new species.
description: Published as part of Huang, Meng-Chi & Yin, Zi-Wei, 2019, The Pselaphodes (Coleoptera: Staphylinidae: Pselaphinae) of Nepal, pp. 165-196 in Revue suisse de Zoologie 126 (2) on page 191, DOI: 10.5281/zenodo.3463445