Gabrius cyanolanius, Hromádka, 2011

Hromádka, L., 2011, Revision of the genus Gabrius STEPHENS 1829 from Madagascar and adjoining Islands (Coleoptera: Staphylinidae: Philonthina), Linzer biologische Beiträge 43 (2), pp. 1377-1397 : 1379-1380

Gabrius cyanolanius nov.sp. (Figs 5-8)

T y p e m a t e r i a l e x a m i n e d Holotype: ″E Madagascar, 19.-23.xii.1998, 30 km ESE of Betroka, 1600 m Vohitrosa forest: 2 km NEE of 1825, J. Janák lgt., // HOLOTYPE Gabrius cyanolanius sp. nov. Hromádka det., 2008, [red oblong lporinted label], rain forest, stream alluvions″ (cJRC), Paratypes: 3 spec., same data as holotype (cJRC, cHPC), 1: E Madagascar, 25.-28.xii.1998, 32 km ESE of Betroka, 1600-1700m Vohitrosa forest, 0.5 km S of 1798, P. Bulirsch lgt. (cJRC).

D e s c r i p t i o n: Body length 4.4-4,6 mm, length of fore body (to end of elytra) 2.4- 2.5 mm. Head black (Fig. 8), pronotum, scutellum, elytra and abdomen black-brown, maxillary and labial palpi and mandibles brown, antennomeres 1-2 and base of antennomere 3 yellow-brown, remaining antennomeres dark brown, legs testaceous.

Head slightly longer than wide (ratio 16: 15), parallel-sided, posterior angles markedly rounded, bearing 1 long black bristle. Between eyes 4 coarse punctures arranged in straight line. Distance between medial punctures three times as large as distance between medial and lateral puncture. Eyes flat and small, much shorter than temples (ratio 5: 9), posterior margin with 1 small and 1 larger puncture, temporal area impunctate. Surface lacks distinct microsculpture.

Antennae slightly widened distally, reaching midlength of pronotum when reclined. Antennomeres 1-4 and 11 longer than wide, antennomere 5 as long as wide, antennomeres 6-10 slightly wider than long. Antennomere 1 twice longer than antennomere 11, anntennomere 2 shorter than antennomere 3.

Pronotum highly convex, longer than wide (ratio 19: 16), parallel-sided. Anterior angles obtusely rounded, bearing several varying long bristles, posterior angles markedly rounded. Each dorsal row with 6 punctures of irregular distance, each sublateral row with 2 punctures, puncture 2 slightly shifted to the lateral margin. Surface lacks microsculpture.

Scutellum finely and sparsely punctured, diameter of punctures slightly larger than eyefacets, separated by 1 puncture diameter in transverse direction.

Elytra as long as wide, distinctly widened posteriad. Punctation coarser and sparser than that on scutellum, separated by one and half or two puncture diameters. Surface lacks microsculpture; setation brown.

Legs. Metatibia longer than metatarsus (ratio 13: 11), metatarsomere 1 slightly shorter than metatarsomere 5, as long as metatarsomeres 2-3 combined.

Abdomen wide, very gradually narrowed posteriorly, punctation at base of all tergites much finer and denser than that on elytra, becoming finer and sparser towards posterior margin of each tergite. Surface lacks microsculpture; setation similar to that on elytra.

E t y m o l o g y: The name of this species, a noun in apposition, is the Latin generic name of the Madagascarian Blue vanga Cyanolanius madascarinus BONAPARTE 1864.

C o m p a r a t i v e n o t e s Gabrius cyanolanius nov.sp., may be separated from G. fimbriolatus by the slightly shorter eyes, longer pronotum and elytra and by the different shape of the aedeagus.

D i s t r i b u t i o n: Madagascar.