Carpelimus (Trogophloeus) finelypunctus, Gildenkov, 2019

Gildenkov, M. Yu., 2019, Seven new species of the genus Carpelimus Leach, 1819 from the “ taprobanae ” group (Coleoptera: Staphylinidae: Oxytelinae), Russian Entomological Journal 28 (2), pp. 138-145 : 140

Carpelimus (Trogophloeus) finelypunctus

Gildenkov, sp.n.

Figs 2 , 9–11 .

MATERIAL. Holotype, ♂ “ INDIA Kerala Palghat Hills 10 km N. Malampuzha Dam 150 m. 27-XI-72 Besuchet Löbl Mussard” ( MHNG). Paratype: 1♀ “ INDIA Kerala Palghat Hills 10 km N. Malampuzha Dam 150 m. 27-XI-72 Besuchet Löbl Mussard” (cMG) .

DESCRIPTION (holotype).

Length 1.6 mm. Colouration brown. Head, pronotum and abdomen dark brown, elytra much lighter, brown with reddish tint; 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 15:23. Neck constriction prominent. Eyes large, convex. Temples well-developed, round, eye diameter in dorsal view markedly longer but less than 1.5 times as long as temple length. Head about as wide across eyes as across temples ( Fig. 2 ). Head surface with delicate, very fine and dense punctation. Puncture diameter about 5 times as small as eye facet. Distances between punctures much smaller than their diameter, individual punctures barely discernible. Antennae rather long, antennal segments 1–3 and 5 elongate; segments 4 and 6–7 about as wide as long; segments 8–10 slightly transverse ( Fig. 2 ); segment 11 (studied only in female) elongate, conical. Last 3 segments more massive than others and form loose club.

Pronotum widest about 2/3 its length from base, then narrowed. Lateral margins straight from base, then broadly rounded ( Fig. 2 ). Ratio of pronotum length to its maximum width about 18:24. Surface of pronotum with delicate, very fine and dense punctation. Puncture diameter about 5 times as small as eye facet. Distances between punctures significantly smaller than their diameter, individual punctures barely discernible. Puncture patterns similar to those on head. Pronotal disc with barely discernible depressions: 2 faint, symmetrical oval depressions in central part of disc and small flattening at base of pronotum ( Fig. 2 ).

Ratio of length of elytra to their combined width about 28:30. Scutellum with shallow, round depressions ( Fig. 2 ). Surface of elytra with delicate, fine and dense punctation. Puncture diameter about equal to diameter of eye facet. Distances between punctures slightly smaller than their diameter, interspaces smooth, slightly shining.

Abdomen delicately shagreened.

Aedeagus of characteristic structure ( Figs 9, 10 ).

Female. Sexual dimorphism absent, female morphologically similar to male. Spermatheca of characteristic structure ( Fig. 11 ).

COMPARATIVE REMARKS. The new species is most similar in size, colouration and punctation patterns to closely related species, C. vagans (Cameron, 1930) and C. hoaensis sp.n. The new species differs from C. vagans in having slightly smaller size, lighter colouration of the elytra, and finer punctation on the pronotum, and is clearly distinguished by the structure of the aedeagus [ Gildenkov, 2015, p. 385, fig. 19: 13]. It differs from C. hoaensis sp.n. in having slightly smaller size, more prominent eyes, and finer punctation on the pronotum and is clearly differentiated from it by the structure of the aedeagus ( Figs 9–10, 12–13 ).

DISTRIBUTION. India.

ETYMOLOGY. From the Latinised form of “finely punctured” referring to a very fine punctation on the surface of the head and pronotum.

Figures

Figs 1–2. Carpelimus (Trogophloeus) spp., holotypes, males, dorsal view: 1 — C. cachariensis, sp.n.; 2 — C. finelypunctus, sp.n. Рис. 1–2. Carpelimus (Trogophloeus) spp., глотипы, самцы, сверху: 1 — C. cachariensis, sp.n.; 2 — C. finelypunctus, sp.n.

Figs 7–22. Genitalia of Carpelimus (Trogophloeus) spp.: 7–8 — C. cachariensis sp.n.; 9–11— C. finelypunctus sp.n.; 12–14 — C. hoaensis sp.n.; 15–17 — C. keraliensis sp.n.; 18–19 — C. khasiensis sp.n.; 20–22 — C. madrasiensis sp.n.; 7, 9, 12, 15, 18, 20 — aedeagus, ventral view (holotypes); 8, 10, 13, 16, 19, 21 — aedeagus, lateral view (holotypes); 11, 14, 17, 22 — spermatheca (paratypes). Scale bar: 0.25 mm. Рис. 7–22. Гениталии Carpelimus (Trogophloeus) spp.: 7–8 — C. cachariensis sp.n.; 9–11— C. finelypunctus sp.n.; 12–14 — C. hoaensis sp.n.; 15–17 — C. keraliensis sp.n.; 18–19 — C. khasiensis sp.n.; 20–22 — C. madrasiensis sp.n.; 7, 9, 12, 15, 18, 20 — Эдеагус, сниЗу (голотипы); 8, 10, 13, 16, 19, 21 — Эдеагус, сбоку (голотипы); 11, 14, 17, 22 — сперматека (паратипы). МасШтаб: 0.25 mm.