Carcinocephalus cuccodoroi, Shavrin, 2022

Shavrin, Alexey V., 2022, New species and records of Omaliini McLeay, 1825 from Eastern Palaearctic and Oriental regions (Coleoptera: Staphylinidae: Omaliinae), Zootaxa 5169 (5), pp. 457-471 : 459-460

Carcinocephalus cuccodoroi sp.n.

( Figs. 9–12 )

Type material examined. Holotype ♂ (dissected): ‘ INDIA: Assam: Dima Hasao | Mt.Barail , Notun Leikul | 25°07`56``N; 93°02`59``E | 24.11.1998, 850 m | G. Cuccodoro #4a’ <printed>, ‘HOLOTYPE | Carcinocephalus | cuccodoroi sp.n. | Shavrin A.V. des. 2022’ <red, printed> ( MHNG).

Description. Measurements: HW: 0.36; HL: 0.22; AL: 0.53; OL: 0.12; PL: 0.27; PW: 0.42; ESL: 0.51; EW: 0.51; AW: 0.47; MTbL: 0.22; MTrL: 0.13 (MTrL 1–4: 0.05; MTrL 5: 0.08); AedL: 0.27; TL: 1.82.

Body somewhat elongate, slightly convex. Head reddish-brown, with slightly paler frontal portion; pronotum, elytra and abdomen yellow-brown, with paler laterobasal portions of pronotum, latero-apical portions of elytra and paratergites; antennomeres 5–11 brown; mouthparts, antennomeres 1–4 and legs yellow. Head with several very fine punctures in middle; neck without visible punctation; pronotum with sparse and fine punctation, sparser and finer in apical and basal portions; punctation of elytra denser and deeper than that on pronotum, finer along suture and sparser in apical portion, punctures on each elytron arranged to vague and tangled five rows; abdomen with indistinct, very fine and sparse punctation. Body glossy, with strong transverse microsculpture in middle of vertex and diagonal meshes between infraorbital ridges and anteocellar foveae; neck with indistinct isodiametric microreticulation; pronotum, scutellum and elytra without microsculpture; abdomen with moderately strong and dense isodiametric meshes. Head with long and moderately dense setation in frontal portion, with several semierect setae between apical margins of eyes and median portion; lateral portions of pronotum, elytra and paratergites of abdomen with sparse and short, erect setae.

Head 1.6 times as broad as long, with slightly elevated medioapical and infraorbital portions, with moderately deep, suboval impressions between supra-antennal prominences and middle part of vertex; anteocellar foveae deep and long, diagonally stretching toward level of anterior third of eyes; middle part between level of apical third of eyes with narrow transverse impression; anterolateral portions of head between antennal insertion and anterior margin of eye slightly concaved. Eyes large and convex; postocular ridge small, subacute; surface between postocular ridge and posterior margin of eye as long as diameter of one nearest ommatidium. Ocelli large, convex, located at level of postocular ridges; distance between ocelli about one and a half times less than distance between ocellus and posterior margin of eye; neck constriction without visible occipital furrow. Last segment of maxillary palpomeres slightly broader than preceding palpomere, from middle gradually narrowed toward subacute apex; preapical segment small, transverse, slightly broader than long. Antenna short, reaching apical margin of pronotum when reclined, with transverse antennomeres 4–10; antennomeres with long setation, distinctly denser on 5–10; basal antennomere more than twice as long as broad, antennomere 2 suboval, distinctly narrower than basal antennomere, 3 very narrow, slightly shorter than 2, 4 very small, slightly broader than 3, 5 distinctly broader and slightly longer than 4, 6 longer and broader than 5, 7–10 longer and broader than 6, apical antennomere about as long as two preapical antennomeres, from middle gradually narrowed toward rounded apex.

Pronotum slightly convex, 1.5 times as broad as long, slightly broader than head, from widest anterior third strongly narrowed posteriad; anterior angles widely rounded and slightly protruded anteriad; anterior margin rounded, narrower than posterior margin, with shallow subtriangular emargination in middle; posterior angles subacute, distinctly protruded posteriad; lateral edges with smooth irregular crenulation; lateral portions without mediolateral pits, with widely impressed laterobasal portions.

Elytra slightly convex, as long as broad, 1.8 times as long as pronotum, lateral sides bordered, slightly explanate in middle; posterior margins somewhat straight. Hind wings fully developed.

Legs moderately short; metatarsomeres 1.6 times as long as metatibia.

Abdomen convex, slightly narrower than elytra, with two oval tomentose spots (wing-folding patches) in middle of abdominal tergite IV and two smaller spots in middle of tergite V; apical margin of tergite VII with very narrow palisade fringe.

Male. Apical margin of abdominal tergite VIII slightly concave ( Fig. 11 ). Apical margin of abdominal sternite VIII widely rounded ( Fig. 12 ). Aedeagus narrow, from widest basal part gradually narrowed toward truncate apex; parameres very wide and long, but slightly not exceeding apex of median lobe, with two apical and two longer preapical setae; internal sac with paired sclerotized structures in apical, median and basal parts and moderately long flagellum between them ( Fig. 9 ). Lateral aspect of aedeagus as in Fig. 10 .

Female unknown.

Comparative notes. Carcinocephalus cuccodoroi sp.n. differs from all congeners ( Shavrin 2018) by the narrower and flattened body, and different internal and external morphology of the aedeagus.

Distribution. The new species is at present known only from the type locality in Assam, India.

Bionomics. The holotype was collected at elevation 850 m a.s.l. in gallery forest by sifting of rotten fruits in dry stream (G. Cuccodoro, pers. comm.).

Etymology. Patronymic, the species is named to honour my colleague, Giulio Cuccodoro (Genève), the collector of the type specimen.

Figures

FIGURES 9–15. Carcinocephalus cuccodoroi (Figs. 9–12) and Paraphloeostiba cooteri (Figs. 13–15): 9–aedeagus, parameral view, 10–aedeagus, lateral view, 11–male abdominal tergite VIII, 12–male abdominal sternite VIII, 13–female abdominal tergite VIII, 14–female abdominal sternite VIII, 15–female accessory sclerite. Scale bar: 0.10 mm.