Carpelimus (Trogophloeus) nigerfrontis Gildenkov, 2023

Gildenkov, M. Yu., 2023, New species of the genus Carpelimus Leach, 1819 (Coleoptera: Staphilinidae: Oxytelinae) from Moluccas, Far Eastern Entomologist 474, pp. 1-6 : 2-4

Carpelimus (Trogophloeus) nigerfrontis Gildenkov , sp. n.

https://zoobank.org/NomenclaturalActs/ BCE6A88C-0D36-4D09-8889-14BDBA52014A

Figs 1–4

TYPE MATERIAL. Holotype – ♂, Indonesia: Moluccas, Tanimbar Island with label “ INDO: Maluc F911131 Tanimbar Isl: Yamdena Krawain (12) Agosti. 16.9.91 leaflit” ( MHNG) . Paratypes: 1♀, Indonesia : “ INDO: Maluc F911131 Tanimbar Isl: Yamdena Krawain (12) Agosti. 16.9.91 leaflit” ( MHNG) ; 2♀, Indonesia: Moluccas, Tanimbar Island “ INDON: Maluc. F911146 Tanimbar Isl: Yamdena Domaki, NW of Saumlaki D. Agosti. 18.9.1991 ” (1♀ − MHNG; 1♀ − cMG) ; 1♀, Indonesia: Moluccas, Halmahera Island “ MALUKU: Is. Halmahera Buli, Maba 6.XI.1999, ca. 20 m, leg. A. RIEDEL” ( SMNS) .

DESCRIPTION. MALE (holotype). Body fairly flat, length 1.8 mm. Body completely light brown, legs and antennae yellow-brown; anterior frons black. Integument slightly shining, body with short, light-coloured setation.

Head transverse, with wide base, ratio of its length (from posterior margin of head to anterior margin of clypeus) to maximum width about 19: 25. Neck constriction prominent. Eyes large, convex. Temples well-developed, round, eye diameter in dorsal view barely exceeds temple length. Head widest across temples ( Fig. 1 ). Head surface with very delicate, very fine and dense punctation. Diameter of punctures about 3.5 times as small as eye facet. Distances between punctures approximately equal to their diameter, interspaces smooth, slightly shining. Antennae rather long, antennal segments 1–5 elongate; segments 6–10 about as long as wide; segment 11 elongate, conical. Last 3 segments more massive than others and form loose club ( Fig. 1 ).

Pronotum maximum broad after about 2/3 its length from base, then narrowed.

Lateral margin with small notch at base, then smoothly rounded ( Fig. 1 ). Ratio of pronotum length to its maximum width about 19:26. Pronotum with very delicate, very fine and dense punctation, like head surface. Pronotal disc with two pairs of symmetrical oval depressions in the central part, which merge into two bean-shaped longitudinal depressions separated by medial crest. There is also one unpaired oval depression along the medial line at the apex of pronotum and wide oval depressions at the lateral margins ( Fig. 1 ).

Length of elytra related to their combined width approximately as 29: 33. Scutellum with shallow, round depressions ( Fig. 1 ). Elytra with delicate, fine and dense punctation. Diameter of punctures about 1.5 times as small as eye facet. Distances between punctures approximately equal to their diameter, interspaces smooth, slightly shining.

Abdomen delicately shagreened.

Aedeagus of characteristic structure ( Figs 2, 3 ).

Female. Sexual dimorphism absent, female morphologically similar to male. Spermatheca of characteristic structure ( Fig. 4 ).

DISTRIBUTION. Indonesia: Moluccas.

DIAGNOSIS. By flattened body with a broad head and, especially, coloration - completely light brown with a black anterior frons, Carpelimus (Trogophloeus) nigerfrontis sp. n. similar to majority species of the closely related genus Mendaxinus Gildenkov, 2004 . According to the structure of the 3-segmented tarsus, aedeagus, and spermatheca, it undoubtedly belongs to the genus Carpelimus . The new species is not similar to other Carpelimus known from Moluccas and reliably differs from them and other species by the structure of aedeagus ( Figs 2−4 ).

ETYMOLOGY. From Latin “frontis” (forehead) and “niger” (black); the name refers to the color of the head.

Figures

Figs 1–4. Carpelimus (Trogophloeus) nigerfrontis sp. n. (1–3 – male, holotype; 4 – female, paratype). 1 – body, dorsal view; 2 – aedeagus, dorsal view; 3 – the same, lateral view; 4 – spermatheca. Scale bars: 0.25 mm.