Carpelimus (Trogophloeus) cachariensis 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 : 138-140

Carpelimus (Trogophloeus) cachariensis Gildenkov , sp.n.

Figs 1 , 7–8 .

MATERIAL. Holotype, ♂ “ INDIA: Assam North Cachar Hills dist., Mt Borail, trail Jatinga-summit , 28.x.2004, 25°07’07’’ N,

How to cite this article: Gildenkov M.Yu. 2019. Seven new species of the genus Carpelimus Leach, 1819 from 93°02’13’’ E ” “ 650 m. at large, mixed broadleaf forest, R. Leschen, C. Carlton, G. Cuccodoro, D. Erne; RL-062 FIELD MUS. NAT. HIST.” ( FMNH). Paratype: 1♂ “ INDIA: Assam North Cachar Hills dist., Mt Borail Trail, 25°07’07’’ N, 93°02’13’’ E, 650 m. ” “ 28.x.2004, Berlese various litters, C. Carlton, R. Leschen, G. Cuccodoro, D. Erne; CC-029 FIELD MUS. NAT. HIST.” (cMG) .

DESCRIPTION (holotype).

Length 2.0 mm. Colouration brown. Head, pronotum and elytra dark brown, abdomen dark brown; antennae light brown, legs, antennal segments 1 and 9–11 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 17:27. Neck constriction prominent. Eyes rather 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. 1 ). 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 smooth, slightly shagreened. Antennae rather long, antennal segments 1–3 and 5–6 elongate; segments 4–7 about as wide as long; segments 8–10 slightly transverse; segment 11 elongate, conical. Last 3 segments more massive than others and form loose club ( Fig. 1 ).

Pronotum widest about 2/3 its length from base, then narrowed. Lateral margins slightly notched at base, then smoothly rounded ( Fig. 1 ). Ratio of pronotum length to its maximum width about 22:32. Surface of pronotum with rather distinct, fine and dense punctation; punctation similar to that on head. Puncture diameter about twice as small as eye facet. Distances between punctures significantly smaller than their diameter, interspaces slightly shagreened. Pronotal disc with 2 pairs of barely discernible, symmetrical depressions, round at base and oval in central part of disc ( Fig. 1 ).

Ratio of length of elytra to their combined width about 34:38. Scutellum with shallow, round depressions ( Fig. 1 ). Surface of elytra with rather distinct, 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 7–8 ).

Female unknown.

COMPARATIVE REMARKS. The new species is most similar in size, morphology of the pronotum, colouration and punctation patterns to closely related species, C. magnicollis Gildenkov, 2014 and C. keraliensis sp.n. The new species differs from C. magnicollis in its smaller size and less prominent eyes and is clearly distinguished by the structure of the aedeagus [ Gildenkov, 2015, p. 385, Figs 19 : 45]. It differs from C. keraliensis sp.n. in having less prominent eyes, slightly less distinct punctation on the pronotum and is clearly differentiated from it by the structure of the aedeagus ( Figs 7– 8, 15–16 ).

DISTRIBUTION. India.

ETYMOLOGY. Named for its geographical distribution.

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.