The Neotropical species of the genus Osorius G - M, 1829 with remarks to the Neotropical Osoriid complex (Coleoptera: Staphylinidae: Osoriinae) Irmler, Ulrich Beiträge Zur Entomologie = Contributions to Entomology 2010 2010-12-20 60 2 363 426 75BTW BERNHAUER BERNHAUER [267,614,1518,1542] Insecta Staphylinidae Osorius Animalia Coleoptera 32 395 Arthropoda species peruvianus    Typematerial examined:    Peru: 1 male, without further information ( holotype, FMNH).  Additional material examined:    Peru: Puerto Maldonado, 15 kmNE ( 69°03' W, 12°33' S), flight intercept trap,  200 melevation, 2 specimens,  10.7.1989, leg. R. Leschen( KU);  15 kmN, Tambopata Prov, ex molassas,  200 melevation, 2 specimens,  11.7.1989, leg. J.S. Ashe( KU);  Madre de Dios, Pantiacollalodge ( 71°13' W, 12°39' S), Alto M.d. Dios River,  400 melevation, 2 specimens,  26.10.2000, leg. R.W. Brooks( KU, UIC);  Tingo Maria, Huan,  750 melevation, 3 specimens,  19.5.1947and 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,  19.10.1947and 15.9.1948, leg. A. Maller( AMNH).   Diagnosis: The species is very similar to  O. integerintegerwith regard to punctation and microsculpture of the fore body.  O. peruvianusperuvianusis 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 mmlong, 2.4 mmwide; 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.  AntennaeAntennaerelatively thick; with 2 ndantennomere short, wider than long; 3 rdantennomere 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 mmlong, 2.6 mmwide; 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 mmlong, 2.7 mmwide; with coarse and dense punctation and indistinct coriaceous ground sculpture; surface shiny.  Aedeaguspear-shaped with moderately long apical part with obtuse apex and wide distal fold. [190,836,1613,1638] FMNH Peru Peru 32 395 1 1 holotype 1989-10-07 KU R. Leschen Peru 200 -12.55 Puerto Maldonado 1293 -69.05 33 396 2 1989-11-07 KU J. S. Ashe Peru 200 Tambopata Prov 33 396 2 2000-10-26 KU, UIC Alto M. & R. W. Brooks Peru 400 -12.65 Dios River 1293 -71.21667 Pantiacolla 33 396 2 Madre de Dios 19.5. 1947 and 16.5. 1947 AMNH J. Pallister Peru 750 Huan Tingo Maria 33 396 3 1972-10-15 AMNH da Barra & M. Alvarenga Brazil -20.083334 Espirito Santo 1269 -40.2 33 396 1 Espirito Santo 19.10. 1947 and 15.9. 1948 AMNH A. Maller Brazil -23.3 Rolandia 1256 -51.366665 33 396 3 Parana