Carpelimus (Trogophloeus) kwauensis Gildenkov, 2023

Gildenkov, M. Yu., 2023, Two new species of the genus Carpelimus Leach, 1819 from New Guinea, related to Carpelimus (Trogophloeus) notumus Gildenkov, 2019 (Coleoptera: Staphylinidae: Oxytelinae), Russian Entomological Journal 32 (1), pp. 40-43 : 41-42

Carpelimus (Trogophloeus) kwauensis Gildenkov , sp.n.

Figs 1, 3–4 .

MATERIAL. Holotype, ♂, Indonesia, West Papua “IRIAN JAYA: Mokwam Kwau 1300-1650m 17.IV.1993 leg. A. RIEDEL” ( SMNS) . Paratypes: 1♂, Indonesia, West Papua “IRIAN JAYA: Mokwam Kwau 1300–1650m 17.IV.1993 leg. A. RIEDEL” (cMG) ; 1♀, Papua New Guinea “18 VI 79 | PNG EN Prov. Umg. Igipinti Korindaiop. R.” “Papua Nlle Guinee W.G. Ullrich ” ( MNHG) .

DESCRIPTION (holotype). Length 1.9 mm. Colouration brown. Legs and antennal bases yellow-brown, antennal apices darker, light brown. Integument slightly shining, body with short, light-coloured setation.

Head transverse, with a wide base, ratio of its length (from posterior margin of head to anterior margin of clypeus) to maximum width about 18:25. Neck constriction prominent. Eyes large, convex. Temples well-developed, round, eye diameter in dorsal view barely exceeds temple length. Head width across eyes approximately equal to its width across temples ( Fig. 1 ). Head surface with delicate, fine and dense punctation. Diameter of punctures about 3.0 times as small as eye facet. Distances between punctures approximately equal to their diameter, interspaces smooth, slightly shining. Antennae rather long, antennal segments 1–3 elongate; segments 4–10 slightly elongate; segment 11 elongate, conical. Last 3 segments more massive than others and form loose club ( Fig. 1 ).

1 2

Pronotum maximum broad after about 2/3 its length from base, then narrowed. Lateral margin smoothly rounded ( Fig. 1 ). Ratio of pronotum length to its maximum width about 20:26. Surface of pronotum with delicate, fine and dense punctation, like head surface; Pronotal disc with 2 pairs of prominent, symmetrical depressions and 1 unpaired oval depression along midline near apex. Base of pronotal disc with narrow, crescent-shaped depressions, weakly separated by medial ridge. Central part of disc with rather deep, oval depressions fused across midline to single butterfly-shaped depression.

Length of elytra related to their combined width approximately as 31:36. Scutellum with shallow, round depressions ( Fig. 1 ). Elytra with delicate, fine and dense punctation. Diameter of punctures about 2.5 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 3–4 ).

Female. Sexual dimorphism absent, female morphologically similar to male. Spermatheca failed to isolate and its structure is unknown.

COMPARATIVE REMARKS. The new species is very similar and closely related to Carpelimus (Trogophloeus) notumus Gildenkov, 2019 from the Philippines and Carpelimus (Trogophloeus) vilisus Gildenkov, 2019 from Thailand. It differs from them by slightly less developed eyes, slightly finer punctation of elytra and slightly longer antennae. Reliably differs only by the structure of aedeagus [ Figs 3–4 ; Gildenkov, 2019a: Figs 5–6 , 8–9]. The new species differs from Carpelimus (Trogophloeus) plenus Gildenkov, 2019 from the Philippines by smaller body size and finer punctation; reliably differs by the structure of aedeagus [ Figs 3–4 ; Gildenkov, 2019a: Figs 9–10]. It well differs from Carpelimus (Trogophloeus) ibelensis, Gildenkov, 2020 and Carpelimus (Trogophloeus) irianensis Gildenkov, 2020 living in New Guinea by lighter coloration, significantly more developed depressions on pronotal disc, reliably differs by the structure of aedeagus [ Figs 3–4 ; Gildenkov, 2020a: Figs 10–13].

DISTRIBUTION. Indonesia (West Papua), Papua New Guinea.

ETYMOLOGY. The species name is given according to the name of the village (Kwau Village) in West Papua’s, in Manokwari Regencies where the holotype was collected.

Figures

Figs 1–6. Carpelimus spp., holotypes, males: 1, 3–4 — C. (Trogophloeus) kwauensis, sp.n.; 2, 5–6 — C. (Trogophloeus) nabireensis, sp.n.; 1–2 — dorsal view; 3, 5 — aedeagus, ventral view; 4, 6 — aedeagus, lateral view. Scale bar: 0.25 mm. Рис. 1–6. Carpelimus spp., голотипы, самцы,: 1, 3–4 — Carpelimus (Trogophloeus) kwauensis, sp.n.; 2, 5–6 — Carpelimus (Trogophloeus) nabireensis, sp.n.; 1–2 — вид сверху; 3, 5 — Эдеагус, сниЗу; 4, 6 — Эдеагус, сбоку. МасШтаб: 0,25 мм.