Gabrius serinus, Hromádka, 2014

Hromádka, L., 2014, Five new species of the genus Gabrius from Afrotropical region (Coleoptera: Staphylinidae: Staphylininae: Philothina), Linzer biologische Beiträge 46 (1), pp. 695-702 : 699-700

Gabrius serinus nov.sp. (Figs 13-15)

T y p e m a t e r i a l e x a m i n e d Holotype:, Tanzania: Uru north, env. 1750 m, 16 km. N. of Moshi, v.2010, M. KuboĖ lgt, // Holotypus Gabrius serinus nov.sp. Hromádka det., 2013. [red oblong label printed] (cHro)).

D e s c r i p t i o n: Body length 6.3 mm, length of fore body (to end of elytra) 3.6 mm. Colouration. Body black, posterior margin of all tergites narrowly reddish, palpomere three of maxillary and labial palpi brown-yellow, remaining palpomeres and antennae black, femora brown-yellow, tibiae black, tarsi black, paler distally.

Head wider than long (ratio 26: 23), from posterior margin of eyes slightly narrowed posteriad, clypeus with a relatively large rounded depression medially. Posterior angles indisting. Between eyes four coarse punctures, medial punctures distinctly shifted anteriad, distance between medial punctures five times larger than distance between medial and lateral puncture. Three inter-ocular punctures on each side, arranged in a vertical row. Eyes twice shorter than temples (ratio 6: 12), posterior margin with two coarse punctures, temporal area with several varying large punctures. Surface without microsculpture.

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

Pronotum as long as wide, anterior angles almost rectangular, obtusely rounded, posterior angles markedly rounded. Each dorsal row with six coarse approximately equidistant punctures, each sublateral row with two punctures, puncture two shifted to the lateral margin. One long bristle in anterior third of sides. Surface without microsculture.

Scutellum densely and finely punctured, diameter of punctures as large as eye-facets, punctures separated by mostly one puncture diameter.

Elytra wider than long /ratio 37: 33), distinctly widened posteriad. Punctation fine and dense, diameter of punctures slightly larger than eye-facets, separated by distance of one puncture diameter or smaller. Surface without microsculpture; setation brown.

Legs. Metatibia longer than metatarsus (ratio 20: 17), metatarsomere 1 shorter than metatarsomere 5, as long as metatarsomeres 3-4 combined.

Abdomen wide, from visible tergite III gradually narrowed posteriad. First three visible tergites with two basal lines, elevated area between lines with scattered punctures. Punctation at base of visible tergites finer and sparser than that on elytra, becoming sparser towards posterior margin of each tergite. Surface without microsculpture; setation similar to that on elytra, in posterior half, longer.,

D i f f e r e n t i a l d i a g n o s i s Gabrius serinus nov.sp. differs from G. istonyx nov.sp., by the darker antennomere 1, head and pronotum not golden iridescent, longer pronotm, darker elytra and abdomen and by the different shape of the aedeagus.

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

E t y m o l o g y: The name of this species, a noun in apposition, is the Latin generic of the African Abyssinian siskin Serinus nigriceps RÜPELL 1838.