Osorius wasmanni BERNHAUER

Irmler, Ulrich, 2010, The Neotropical species of the genus Osorius G - M, 1829 with remarks to the Neotropical Osoriid complex (Coleoptera: Staphylinidae: Osoriinae), Beiträge Zur Entomologie = Contributions to Entomology 60 (2), pp. 363-426 : 406-407

Osorius wasmanni BERNHAUER ,, 1920: 138 (Figs 22 a-c)

Type material examined:

Brazil: Rio de Janeiro, Colonia alpina, 1 male, without further date, leg. Göldi (holotype, FMNH) .

Additional material examined:

Brazil: Guaraquecaba (48°19'33 W, 25°17'54 S), Reserva Serra do Itaqui, moist lowland forest, sift litter, Winkler sample, 2 males, 9.9.2007 and 21.5.2007, leg. P. Hopp ( CC, UIC) .

Diagnosis:

The species can be differentiated from similar species in size by the coarsely punctate pronotum with polished surface. In the similar O. dentatus , a weak microsculpture is visible on the pronotum.

Description:

Length: 9.5 mm. Colour: black.

Head :: 1.6 mm long, 2.0 mm wide; coarsely and densely punctate; partly with coriaceous punctation; distance between punctures on average half as wide as diameter of punctures; isodiametric microsculpture distinct; surface shiny; a small space on disc at antennal base and on posterior portion without punctures and polished surface; front edge of clypeus with a pair of stout lateral teeth and with flat emargination between; eyes moderately long; slightly shorter than temples; with supraocular and postocular striae; postocular striae pointing ventrad; with several supraocular granular punctures and two supraocular setae.

AntennaeAntennae more or less elongate; 2 nd antennomere oblong; 3 rd conical, scarcely longer than 2 nd; antennomeres 4 to 6 longer than wide; subsequent antennomere more or less quadrate.

Pronotum: 1.9 mm long, 2.1 mm wide; widest at tooth-like front angles; continuously narrowed to posterior angles; an indistinct emargination shortly in front of posterior angles; lateral margin narrow at front angles and slightly widened to posterior angles; posterior edge margined; with coarse and dense punctation; distance between punctures much smaller than diameter of punctures; a fine micro-punctation between normal coarse punctation; without ground sculpture; surface polished; a long longitudinal furrow within smooth midline nearly extending from front edge to posterior margin.

Elytra: 2.2 mm long, 2.1 mm wide; with deep coriaceous ground sculpture; punctation scarcely visible between ground sculpture; surface shiny.

AedeagusAedeagus elongate with extremely long sinusoidal, apical part ending in an acute apex.