Osorius columbinus 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 : 381-382

Osorius columbinus BERNHAUER ,, 1920: 138 (Figs 6 a-c, 38 A)

Type material examined:

Columbia: Carmen (74°44' W, 4°09' N), 1400 m, rain forest, 1 male, 30.5.1908 leg. Fassl (holotype, FMNH) .

Additional material examined:

Columbia: 5 specimens without further data ( BMNH) ; 2 specimens without further data, Mus. Drews ( ZMUK) ; Ecuador: Cotopaxi: Los Pampas , 20 km S La Union de Toachi (78°57' W, 0°18' S), rotten log , 1 specimen, 12.1.1992, leg. C.E. Carlton ( KU) ; Pichincha: Tandapi (78°47' W, 0°25' S), 1460 m elevation , 3 specimens, 28.07.1967, leg. J.D. Lynch ( KU, UIC) ; Maquipucuna (78°37' W, 0°04' N), 50 km NW Quito, 130 m elevation , 2 specimens, 21.12.1991, leg. C.E. Carlton ( KU) ; Peru: Madre de Dios, Manu National Park (71°11' W, 12°02' S), Cocha Oto rongo, 310 m elevation , 1 specimen under bark, 21.10.2000, leg. R.W. Brooks ( KU) .

Diagnosis:

The species is very similar to O. intermedius , but the coriaceous ground sculpture of elytra is distinctly deeper. Additionally, the lateral teeth of clypeus are more prominent than in O. intermedius . The aedeagus is characterised by an obtuse apex, whereas in O. intermedius apex of aedeagus is long and acute.

Description:

Length: 13.0 mm. Colour: black.

Head :: 2.0 mm long, 2.6 mm wide; deeply and densely punctate; distance between punctures on average as wide as or shorter than diameter of punctures; on clypeus several granular punctures; with isodiametric microsculpture; surface slightly shiny; front edge of clypeus with pair of distinct obtusely prominent teeth; central front emargination with wide slightly projecting prominence; labrum only slightly wider than long, distinctly projecting clypeal front emargination; eyes half as long as temples; dorsad to eyes and behind eyes with few short striae and few granular punctures. AntennaeAntennae with 3 rd antennomere 1.5 times as long as 2 nd; antennomeres 4 to 6 slightly longer than wide; subsequent antennomeres quadrate.

Pronotum: 2.2 mm long, 2.8 mm wide; widest at anterior acute tooth-like angles; distinctly narrowed to posterior angles; in front of posterior angles scarcely emarginate; lateral margin small at anterior angles; distinctly widened to posterior angles; punctation distinct and moderately dense; sparser than on head; on average distance between punctures wider than diameter of punctures; microsculpture as on head; surface slightly shiny; a longitudinal depression in posterior half of smooth midline; few granular punctures in front of posterior edge; posterior edge margined.

Elytra: 2.8 mm long, 2.8 mm wide; with coarse and dense, nearly invisible punctation between deep coriaceous ground sculpture; surface shiny.

Aedeagus broad, nearly circular with short apical part; apex also broad and obtuse, but not carinate.