Carpelimus (Trogophloeus) danangensis Gildenkov, 2020

Gildenkov, M. Yu., 2020, TWO NEW SPECIES OF THE GENUS CARPELIMUS LEACH, 1819 (COLEOPTERA: STAPHILINIDAE: OXYTELINAE) FROM VIETNAM, Far Eastern Entomologist 407, pp. 1-7 : 2-4

Carpelimus (Trogophloeus) danangensis Gildenkov , sp. n.

http://zoobank.org/NomenclaturalActs/ 04618ADC-4FBF-44F9-AC4E-AB44D02F6831

Figs 1 , 3, 4

TYPE MATERIAL. Holotype – ♂, Vietnam: South Central Coast , Da Nang,

“ VIETNAM: Huong son 26.V 1966 Exp. Gy. TOPAL ” “Nr. 567 extracted from moss-crust” ( HNHM) .

DESCRIPTION. MALE (holotype). Length 1.9 mm. Head, pronotum and abdomen black brown; elytra brown; legs and antennae yellow brown. Integument slightly shining, body with short, light-coloured hairs ( Fig. 1 ).

novus sp. n. (holotype, male).

Head transverse, with a wide base, ratio of its length (from posterior margin of head to anterior margin of clypeus) to maximum width about 19:25. Neck constrict-

tion prominent. Eyes small, slightly convex. Temples well-developed, round, eye diameter in dorsal view about equal to temple length. Head widest across temples

( Fig. 1 ). Head surface with rather distinct, rather large and dense punctation. Puncture diameter about 1.2 times as large as eye facet. Distances between punctures significantly smaller than their diameter, interspaces smooth, slightly shining. Antennae rather short ( Fig. 1 ), antennal segments 1–3 elongate; segments 4–6 about as long as wide; segments 7–10 slightly transverse; segment 11 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 smoothly rounded ( Fig. 1 ). Ratio of pronotum length to its maximum width about

21:27. Surface of pronotum with rather distinct, rather large and dense punctation.

Puncture diameter about 1.2 times as large as eye facet. Distances between punctures significantly smaller than their diameter, interspaces smooth, slightly shining. Base of pronotal disc with very dense punctation, punctures coalescent and smaller.

Pronotal disc with 2 pairs of rather shallow, symmetrical depressions separated by medial ridge and 1 unpaired, almost indistinct, oval depression along midline at apex. Base of pronotal disc with wide, crescent-shaped depressions; central part of disc with oval depressions ( Fig. 1 ).

(holotype); 3, 5 – aedeagus, dorsal view; 4, 6 – aedeagus, lateral view. Scale bars: 0.25 mm.

Ratio of length of elytra to their combined width about 28:38. Scutellum with shallow round depressions ( Fig. 1 ). Elytra with rather delicate, rather large and dense punctation. Puncture diameter about 1.5 times as large as eye facet. Distances between punctures significantly smaller than their diameter, interspaces smoothly shagreened, slightly shining.

Abdomen delicately shagreened.

Aedeagus of characteristic structure ( Figs 3, 4 ).

Female. Unknown.

DISTRIBUTION. Vietnam.

ETYMOLOGY. Named for its geographical distribution.

DIAGNOSIS. The new species in size, colouration and punctation patterns is quite similar to Carpelimus (Trogophloeus) corticinus (Gravenhorst, 1806) , a widely distributed Palaearctic species. C. (T.) danangensis sp. n. also resembles the latter species in the presence of massive sclerotized structures in the apical part of the internal sac of the aedeagus, but differs in having shorter elytra and markedly larger,

less distinct punctation on the head, pronotum and elytra. It can be readily distinguished from C. corticinus and other representatives of the “ corticinus ” group

(Gildenkov, 2015) by the structure of the aedeagus and by the absence of arch-shaped sclerotized structures at the base of the internal sac ( Figs 3, 4 ).

Figures

Figs 1, 2. Body, dorsal view. 1 – Carpelimus danangensis sp. n. (holotype, male); 2 – C.

Figs 3–6. Carpelimus spp. 3, 4 – C. danangensis sp. n. (holotype); 5, 6 – C. novus sp. n.