Carpelimus (Trogophloeus) hoaensis Gildenkov, 2019, sp.n.
Creators: name: Gildenkov, M. Yu.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Carpelimus
Carpelimus hoaensis

description: Carpelimus (Trogophloeus) hoaensis   
 Gildenkov, sp.n.   
Figs 3, 12–14.  
MATERIAL. Holotype, ♂ “ VIET NAM, Ha Son Bink. Hoa Binh ” “Berlesate, No. 89 30.I.1986 Mahunka-01àh” (HNHM). Paratypes: 2♂♂, 2♀♀ “ VIET NAM, Ha Son Bink. Hoa Binh ” “Berlesate, No. 89 30.I.1986 Mahunka-01àh” (HNHM; 1♂, 1♀ cMG).  
DESCRIPTION (holotype).  
Length 1.8 mm. Colouration brown. Head, pronotum and abdomen dark brown, elytra much lighter, brown; legs and antennae yellow brown. Integument slightly shining, body with short, light-coloured hairs.  
Head transverse, with wide base, ratio of its length (from posterior margin of head to anterior margin of clypeus) to maximum width about 16:24. Neck constriction prominent. Eyes small, slightly convex. Temples well-developed, round, eye diameter in dorsal view slightly smaller than temple length. Head widest across temples (Fig. 3). Head surface with rather distinct, fine and dense punctation. Puncture diameter about twice as small as eye facet. Distances between punctures slightly smaller than their diameter, interspaces slightly shagreened. Antennae rather short, antennal segments 1–3 elongate; segments 4–5 about as wide as long; segments 6–7 slightly transverse; segments 8–10 transverse; segment 11 elongate, conical. Last 3 segments more massive than others and form loose club (Fig. 3).  
Pronotum widest about 2/3 its length from base, then narrowed. Lateral margins broadly rounded (Fig. 3). Ratio of pronotum length to its maximum width about 19:26. Surface of pronotum with rather distinct, fine and dense punctation. Puncture diameter about twice as small as eye facet. Distances between punctures slightly smaller than their diameter, interspaces slightly shagreened. Punctation patterns similar to those on head. Pronotal disc with 2 pairs of barely discernible, symmetrical depressions, round at base and oval in central part of disc (Fig. 3).  
Ratio of length of elytra to their combined width about 25:33. Scutellum with shallow, round depressions (Fig. 3). Surface of elytra with rather distinct, fine and dense punctation. Puncture diameter about 1.5 times as long as eye facet. Distances between punctures slightly smaller than their diameter, interspaces smooth, slightly shining.  
Abdomen delicately shagreened.  
Aedeagus of characteristic structure (Figs 12–13).  
Female. Sexual dimorphism absent, female morphologically similar to male. Spermatheca of characteristic structure (Fig. 14).  
 COMPARATIVE REMARKS. The new species is most similar in size, colouration and punctation patterns to closely related species, C. vagans (Cameron, 1930) and C. finelypunctus sp.n. The new species differs from C. vagans in having slightly larger punctation on the elytra and less prominent eyes and is clearly distinguished by the structure of the aedeagus [Gildenkov, 2015, p. 385, fig. 19: 13]. It differs from C. finelypunctus sp.n. in having slightly larger size, less prominent eyes, larger punctation on the pronotum and elytra and is clearly differentiated from it by the structure of the aedeagus (Figs 9–10, 12–13).   
DISTRIBUTION. Vietnam.  
ETYMOLOGY. Named for its geographical distribution.
description: Published as part of Gildenkov, M. Yu., 2019, Seven new species of the genus Carpelimus Leach, 1819 from the " taprobanae " group (Coleoptera: Staphylinidae: Oxytelinae), pp. 138-145 in Russian Entomological Journal 28 (2) on pages 140-141, DOI: 10.15298/rusentj.28.2.04, http://zenodo.org/record/13163815