Micropeneta kinabaluca, Schawaller & Bellersheim, 2022

Schawaller, Wolfgang & Bellersheim, Aron, 2022, Four new species and new records of Micropeneta Pic, 1921 (Coleoptera: Tenebrionidae: Gnathidiini) from the Oriental and Papuan Regions, including a checklist and an identification key, Zootaxa 5168 (4), pp. 471-478 : 474-475

Micropeneta kinabaluca sp. n.

( Figs 1 , 13 )

Type material. Holotype: ♂, Borneo, Sabah, Kinabalu NP., below Layang Layang , 2590 m, 1.V.1987, leg. A. Smetana, SMNS.

Description. Body length 7.0 mm, body shape ovate. Dorsal side, antennae and legs uniformly coloured brown without colour pattern or metallic shine, surface without distinct setation. Head with small punctures, sparser on clypeus, surface finely shagreened. Clypeal membrane not exposed. Male head at genae with a pair of broad, long, glabrous processes, apices rounded and bent inwards. Eyes small, distinctly globose. Antennae ( Fig. 1 ) 10- segmented with 4-segmented club. Pronotum widest across middle, 1.65x as wide as long, anterior angles rounded and protruding, posterior angels rectangular, lateral margins strongly rounded, broadly beaded, with fine dentation, posterior and anterior margins finely beaded; surface of pronotum dull, shagreened, with fine punctures similar to those on head, disc convex without impressions and processes; prothoracic hypomera without punctures, surface smooth and shagreened; prosternal apophysis somewhat protruding backwards. Elytra ovate, surface shining, 0.9x as wide as long, widest across middle, with fine punctures regularly arranged in rows, punctures somewhat larger than pronotal punctures, diminishing in posterior part of elytra, intervals with a row of fine punctures; lateral margins with fine dentation and visible in dorsal view nearly over complete length of elytra, humeral angles not pronounced; epipleura diminishing somewhat before apex, with a few scattered small punctures, punctures smaller than those on metasternum. Hind wings absent. Abdominal ventrites with punctures as large as those on elytra, last visible ventrite 5 not beaded and without modifications. Legs without specific characters, anterior tibiae triangular, with external keel prolonging to the distal angle, and internally with a brush of light hairs, middle and posterior tibiae rounded in cross section and externally without any keels.Aedeagus ( Fig. 13 ) with narrow triangular apicale with rounded apex.

Diagnosis. Micropeneta kinabaluca sp. n. can be recognised by the large body size, the shape of the pair of broad, long, processes with rounded and bent inwards apices on the male head, by the pronotum with lateral margins regularly rounded and broadly beaded, by the pronotum with shagreened surface, and by the distinct regular elytral rows of punctures. See also identification key below.

Etymology. Named after Mt. Kinabalu in whose vicinity the holotype was collected.

Figures

FIGURES 1–8. Dorsal view of male species of Micropeneta Pic, 1921 (all in SMNS). 1. M. kinabaluca sp. n., holotype. 2. M. alabaca sp. n., holotype. 3. M. excavatifrons Pic, 1921, non-type. 4. M. papuana sp. n., holotype. 5. M. sodalis Bremer, 1997, non-type. 6. M. laotica sp. n., holotype. 7. M. leytica Schawaller, 1994, holotype. 8. M. tarandus (Kaszab, 1946), non-type. Scale bar: 3 mm.

FIGURES 9–13. Aedeagus of species of Micropeneta Pic, 1921 (all in SMNS). 9. M. alabaca sp. n., holotype. 10. M. laotica sp. n., holotype. 11. M. papuana sp. n., holotype. 12. M. sodalis Bremer, 1997, non-type. 13. M. kinabaluca sp. n., holotype. Scale bar: 1 mm.