Osorius peruvianus 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 : 395-396

Osorius peruvianus BERNHAUER ,, 1908: 293 (Figs 23 a-d, 38 F)

Type material examined:

Peru: 1 male, without further information (holotype, FMNH) .

Additional material examined:

Peru: Puerto Maldonado , 15 km NE (69°03' W, 12°33' S), flight intercept trap, 200 m elevation, 2 specimens, 10.7.1989, leg. R. Leschen ( KU) ; 15 km N, Tambopata Prov , ex molassas, 200 m elevation, 2 specimens, 11.7.1989, leg. J.S. Ashe ( KU) ; Madre de Dios, Pantiacolla lodge (71°13' W, 12°39' S), Alto M. d. Dios River , 400 m elevation, 2 specimens, 26.10.2000, leg. R.W. Brooks ( KU, UIC) ; Tingo Maria, Huan , 750 m elevation, 3 specimens, 19.5.1947 and 16.5.1947, leg. J. Pallister ( AMNH) ; Brazil: Espirito Santo (40°12' W, 20°05' S), Conceição da Barra, 1 specimen, 15.10.1972, leg. M. Alvarenga ( AMNH) ; Paraná, Rolandia (51°22' W, 23°18' S), 3 specimen, 19.10.1947 and 15.9.1948, leg. A. Maller ( AMNH) .

Diagnosis:

The species is very similar to O. integerinteger with regard to punctation and microsculpture of the fore body. O. peruvianusperuvianus is slightly larger on average than O. integer . It is also similar in size to O. sahlbergi , but pronotal microsculpture is weaker and surface, thus, shinier.

Description:

Length: 10.8 – 11.5 mm. Colour: black.

Head :: 1.5 mm long, 2.4 mm wide; with deep and dense punctation; distance between punctures on average as wide as or shorter than diameter; isodiametric microsculpture dense and deep; surface shiny; lateral angles of clypeus scarcely prominent and widely obtuse; front emargination short and smooth; labrum two times wider than long; scarcely projecting the clypeal emargination; eyes large, scarcely shorter than temples; with numerous striae dorsad to eyes and behind eyes; supraocular striae parallel, postocular ones diagonally pointing ventrad; with numerous granular punctures.

AntennaeAntennae relatively thick; with 2 nd antennomere short, wider than long; 3 rd antennomere oval and more or less twice as long as 2 nd; antennomeres 4 and 5 slightly longer than wide; subsequent antennomeres quadrate.

Pronotum: 2.1 mm long, 2.6 mm wide; widest at front edge; anterior angles tooth-like prominent; sides continuously narrowed to posterior angels; indistinct emargination shortly in front of posterior angles; lateral margin narrow at anterior angles; distinctly wider at posterior angles; posterior edge margined; punctation and microsculpture distinct and as deep as on head; surface shiny; in posterior half of smooth midline, a short longitudinal depression.

Elytra: 2.7 mm long, 2.7 mm wide; with coarse and dense punctation and indistinct coriaceous ground sculpture; surface shiny.

Aedeagus pear-shaped with moderately long apical part with obtuse apex and wide distal fold.