Carpelimus (Trogophloeus), 1830

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 : 5-6

Carpelimus (Trogophloeus) novus Gildenkov, sp. n.

http://zoobank.org/NomenclaturalActs/ 542340FA-66A7-4075-A9AF-F44B1B154D63

Figs 2 , 5, 6

TYPE MATERIAL. Holotype – ♂, Vietnam: Annam “Annam Phuc-Son Nov.

Dez. H. Fruhstorfer” “ novus Brh Type.” “Chicago NHMus M. Bernhauer Collection” ( FMNH). Paratype: 1 ♂ (teneral), Vietnam, Annam “ Annam Phuc-Son Nov .

Dez. H. Fruhstorfer” “Chicago NHMus M. Bernhauer Collection” ( FMNH).

DESCRIPTION. MALE (holotype). Length 2.1 mm. Colouration entirely brown ,

legs and antennal bases light brown. Integument slightly shining, body with short,

light-coloured hairs ( Fig. 2 ).

Head transverse, with a wide base, ratio of its length (from posterior margin of head to anterior margin of clypeus) to maximum width about 19:28. Neck constric-

tion prominent. Eyes large, convex. Temples well-developed, round, eye diameter in dorsal view about 1.5 times as long as temple length. Head about as wide across eyes as across temples ( Fig. 2 ). Head surface with delicate, fine and dense punctation.

Puncture diameter about 2.5 times as small as eye facet. Distances between punctures about equal to their diameter, interspaces smooth, slightly shining. Antennae rather long ( Fig. 2 ), antennal segments 1–6 elongate; segment 7 slightly elongate; segments

8–10 about as long as wide; segment 11 elongate, conical. Last 3 segments more massive and form loose club.

Pronotum widest about 2/3 its length from base, then narrowed. Lateral margins smoothly rounded ( Fig. 2 ). Ratio of pronotum length to its maximum width about

25:31. Surface of pronotum with delicate, fine and dense punctation, punctation similar to that on head. Pronotal disc with 2 pairs of prominent, symmetrical depressions separated by medial ridge and 1 unpaired oval depression along midline near apex. Base of pronotal disc with narrow, crescent-shaped depressions, central part of disc with rather deep, oval depressions ( Fig. 2 ).

Ratio of length of elytra to their combined width about 39:41. Scutellum with shallow, round depressions ( Fig. 2 ). Elytra with rather delicate, fine and dense punctation. Diameter of punctures about equal to that of eye facets. Distances between punctures markedly smaller than their diameter, interspaces smooth, slightly shining.

Abdomen delicately shagreened.

Aedeagus of characteristic structure ( Figs 5, 6 ).

Female. Unknown.

DISTRIBUTION. Vietnam.

ETYMOLOGY. From Latin “ novus ” (new). I have retained the name that was initially given to this species by Max Bernhauer (see labels).

DIAGNOSIS. The new species belongs to the “ notumus ” group: Carpelimus

(Trogophloeus) notumus Gildenkov, 2019; C. (T.) vilisus Gildenkov, 2019; C. (T.)

plenus Gildenkov, 2019; C. (T.) ibelensis Gildenkov, 2020 and C. (T.) irianensis

Gildenkov, 2020. Carpelimus (T.) novus sp. n. is most similar in size, colouration and punctation patterns to C. plenus from the Philippine Islands, but differs from C.

plenus in the oval depressions in the central part of the disc being separated by the medial ridge; it also differs in having slightly more prominent eyes and longer antennae. Carpelimus (T.) novus can readily be distinguished by the structure of the aedeagus and by more developed, sclerotized tooth-like structures in the central part of its internal sac ( Figs 5, 6 ). The new species differs from all species of the group in its geographical distribution and is clearly distinguished by the structure of the aedeagus ( Figs 5, 6 vs Gildenkov, 2019a: figs. 5, 6, 8–11; Gildenkov, 2020: figs.

10–13).

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.