Carpelimus (Bucephalinus) solumus Gildenkov, 1952

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 : 60

Carpelimus (Bucephalinus) solumus Gildenkov , sp.n.

Figs 21 , 28–29

MATERIAL. Holotype, ♂ “S Sulawesi nr. Bantimurung | 700m, 9–12.V.97 | leg. S. Kurbatov ” ( MHNG).

DESCRIPTION (holotype). Length 1.7 mm. Entirely dark brown; legs and antennal base yellow brown, antennae darkened toward apex to 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 17:24. Neck constriction prominent. Eyes of medium size, slightly convex. Temples well-developed, round, eye diameter in dorsal view noticeably longer (but less than 1.5 times as long) than temple length. Head widest across temples ( Fig. 21 ). Head surface with coarse, large and very dense punctation. Punctures umbilicate, their diameter about equal to eye facet. Separate punctures distinct only on vertex, distances between them significantly smaller than their diameter, interspaces shagreened; on remaining surface of head punctures coalescent, forming rather coarse microsculpture ( Fig. 21 ). Antennae rather long, antennal segments 1–3 elongated; segments 4–5 slightly elongated; segments 6–7 about as long as wide; segments 8– 10 slightly transverse; segment 11 elongated, 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 with a barely distinct notch at base, then smoothly rounded ( Fig. 21 ). Ratio of pronotum length to its maximum width about 19:26. Surface of pronotum with coarse, large and very dense punctation. Punctures umbilicate, their diameter about equal to eye facet. Separate punctures indistinct, coalescent, forming rather coarse microsculpture ( Fig. 21 ). Depressions on pronotal disc absent ( Fig. 21 ).

Ratio of length of elytra to their combined width about 29:33. Scutellum with weak rounded depressions ( Fig. 21 ). Surface of elytra with distinct, large and dense punctation. Puncture diameter about 1.5 times as large as eye facet. Distances between punctures much smaller than their diameter, interspaces smooth, slightly shining.

Abdomen delicately shagreened.

Aedeagus of characteristic structure ( Figs 28–29 ).

Female unknown.

COMPARATIVE REMARKS. The new species is somewhat similar in punctation patterns to the African Carpelimus (Bucephalinus) bicyclus (Fauvel, 1907) and C. (B.) turneri Gildenkov, 2012, but can be distinguished by a smaller body size and also differs in geographic distribution and the structure ( Figs 28–29 ) of the aedeagus [ Gildenkov, 2015: 376, Fig. 10 : 5, 7].

DISTRIBUTION. Indonesia, Sulawesi Island.

ETYMOLOGY. From Latin “solum” (lonely); the name alludes to the fact that the female remains unknown.

Acknowledgements. The author wishes to thank all colleagues for making material available for study: Giulio Cuccodoro ( MHNG), Harald Schillhammer ( NHMW), Matthias Hartmann ( NKME) and Wolfgang Schawaller ( SMNS). I also thank Kirill Makarov for taking the photographs (Moscow Pedagogical State University, Russia).

Figures

Figs 20–21. Carpelimus spp., dorsal view: 20 — Carpelimus (Bucephalinus) tanbaranensis, sp.n., paratype, female; 21 — Carpelimus (Bucephalinus) solumus, sp.n., holotype, male. Рис. 20–21. Carpelimus spp., сверху: 20 — Carpelimus (Bucephalinus) tanbaranensis, sp.n., solumus паратип, самка; 21 — Carpelimus (Bucephalinus) solumus, sp.n., голотип, самец.

Figs 22–29. Genitalia of Carpelimus: 22–24 — C. longifilous, sp.n.; 25–27 — C. tanbaranensis, sp.n.; 28–29 — C. solumus, sp.n.; 22, 25, 28 — aedeagus, ventral view (holotypes); 23, 26, 29 — aedeagus, lateral view (holotypes); 24, 27 – spermatheca (paratypes). Scale bar: 0.25 mm. Рис. 22–29. Гениталии Carpelimus: 22–24 — C. longifilous, sp.n.; 25–27 — C. tanbaranensis, sp.n.; 28–29 — C. solumus, sp.n.; 22, 25, 28 — Эдеагус, сниЗу (голотип); 23, 26, 29 — Эдеагус, сбоку (голотипы); 24, 27 – сперматека (паратипы). Масштаб: 0,25 мм.

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.