Carpelimus (Trogophloeus) irianensis Gildenkov, 1830

Gildenkov, M. Yu., 2020, Eight new species of the genus Carpelimus Leach, 1819 from Indonesia (Coleoptera: Staphylinidae: Oxytelinae), Russian Entomological Journal 29 (1), pp. 53-60 : 55

Carpelimus (Trogophloeus) irianensis Gildenkov , sp.n.

Figs 3 , 12–13 .

MATERIAL. Holotype, ♂, West Papua “ IRIAN JAYA: 1.10.1993 Eme Gebiet Okloma , 1500m ” “ca. 139°55´E 04°14´S, leg. M. Balke (28)” ( NHMW).

DESCRIPTION (holotype). Length 1.8 mm. Entirely dark brown; legs and antennae brown. Integument slightly shining, body with short, light-coloured hairs.

Head transverse, with a wide base, ratio of its length (from posterior margin of head to anterior margin of clypeus) to maximum width about 17:22. Neck constriction prominent. Eyes rather large, slightly convex. Temples well-developed, round, eye diameter in dorsal view barely exceeds temple length. Head about as wide across eyes as across temples ( Fig. 3 ). Head surface with delicate, fine and very dense punctation. Puncture diameter about 4.0 times as small as eye facet. Distances between punctures significantly smaller than their diameter, individual punctures almost indistinct. Antennae short, antennal segments 1–2 elongated; segment 3 triangular, about as long as wide; segments 4–5 about as long as wide; segments 6–10 transverse; segment 11 elongated, 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 with a small notch at base, then smoothly rounded ( Fig. 3 ). Ratio of pronotum length to its maximum width about 20:24. Surface of pronotum with delicate, fine and very dense punctation. Puncture diameter about 4.0 times as small as eye facet. Distances between punctures significantly smaller than their diameter, individual punctures in central part of disc almost indistinct. Pronotal disc with 2 pairs of barely distinct, round, symmetrical depressions ( Fig. 3 ).

Ratio of length of elytra to their combined width about 29:31. Scutellum with weak, round depressions ( Fig. 3 ). Surface of elytra with delicate, fine and dense punctation. Puncture diameter about 1.5 times as small 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 unknown.

COMPARATIVE REMARKS. The new species is similar to Carpelimus (Trogophloeus) notumus Gildenkov, 2019 , C. (T.) plenus Gildenkov, 2019, C. (T.) vilisus Gildenkov, 2019, and C. (T.) ibelensis in the structure of the aedeagus [ Gildenkov, 2019a: 32, Figs 5–6 , 8–11 ] (see above), but differs from them in the details of aedeagus morphology ( Figs 12–13 ). It is very similar to Carpelimus (Trogophloeus) sumbaensis (Scheerpeltz, 1957) in size, body proportions and patterns of depressions on the pronotal disc, but is distinguished by a slightly darker colouration, distinct punctation on the surface of the pronotum and can be clearly distinguished by the structure ( Figs 12–13 ) of the aedeagus [ Gildenkov, 2015: 396, Fig. 30: 4–5].

DISTRIBUTION. Indonesia, Western New Guinea.

ETYMOLOGY. Named for its geographical distribution.

Figures

Figs 1–3. Carpelimus (Trogophloeus) spp., holotypes, males, dorsal view: 1 — C. moluccanensis, sp.n.; 2 — C. ibelensis, sp.n.; 3 — C. irianensis, sp.n. Рис. 1–3. Carpelimus (Trogophloeus) spp., голотипы, самцы, сверху: 1 — C. moluccanensis, sp.n.; 2 — C. ibelensis, sp.n.; 3 — C. irianensis, sp.n.

Figs 7–19. Genitalia of Carpelimus: 7–9 — C. moluccanensis, sp.n.; 10–11 — C. ibelensis, sp.n.; 12–13 — C. irianensis, sp.n.; 14– 16 — C. jayapurensis, sp.n.; 17–19 — C. filous, sp.n.; 7, 10, 12, 14, 17 — aedeagus, ventral view (holotypes); 8, 11, 13, 15, 18 — aedeagus, lateral view (holotypes); 9, 16, 19 – spermatheca (paratypes). Scale bar: 0.25 mm. Рис. 7–19. Гениталии Carpelimus: 7–9 — C. moluccanensis, sp.n.; 10–11 — C. ibelensis, sp.n.; 12–13 — C. irianensis, sp.n.; 14– 16 — C. jayapurensis, sp.n.; 17–19 — C. filous, sp.n.; 7, 10, 12, 14, 17 — Эдеагус, сниЗу (голотипы); 8, 11, 13, 15, 18 — Эдеагус, сбоку (голотип); 9, 16, 19 – сперматека (паратипы). Масштаб: 0,25 мм.

Figs 4–6. Carpelimus (Bucephalinus) spp., holotypes, males, dorsal view: 4 — Carpelimus jayapurensis, sp.n.; 5 — Carpelimus filous, sp.n.; 6 — Carpelimus longifilous, sp.n. Рис. 4–6. Carpelimus (Bucephalinus) spp., голотипы, самцы, сверху: 4 — Carpelimus jayapurensis, sp.n.; 5 — Carpelimus filous, sp.n.; 6 — Carpelimus longifilous, sp.n.