Osorius confusus NOTMAN , 1925: 10 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 6TBSJ NOTMAN, 1925: 10 NOTMAN 10 1925 [184,585,457,482] Insecta Staphylinidae Osorius Animalia Coleoptera 19 382 Arthropoda species confusus    Typematerial examined:    Mexico: Omelaca( 96°45' W, 18°43' N), 1 male  16.4.1908. leg. F. Knab( holotype, AMNH).  Additional material examined:    Mexico: Puebla, Santa Lucia,  8 kmSW Cuetzalan( 97°31' W, 20°01' N) ( AMNH),  San Luis Potosi( 91°37' W, 16°36' N), 4 specimens,  10 mi.E Xititla,  9.1.1952, leg. Creightonand 1 specimen,  24.11.1972, leg. J. Reddell( AMNH, UIC);  Castle Ingles, Xilitla, 1 specimen,  7.7.1990, leg. Danoff-Burg( AMNH);  Tlilipan, 2 specimens,  8.8.1967, leg. J. Reddell( ANHM, UIC).   Diagnosis: The species is most similar to  O. sahlbergisahlbergiin size, punctation and microsculpture of head and pronotum. The two species can only be distinctly differentiated by the shape of the aedeagus. Furthermore, in  O. sahlbergisahlbergimicrosculpture of the pronotum is generally isodiametric, while in  O. confusus, sometimes a longitudinally reticulate microsculpture exists. Localities of both  O. sahlbergisahlbergiand  O. confususare restricted to South Braziland Mexico, respectively.   Description:  Length: 10.0 mm. Colour: black.  Head:: 1.40 mmlong, 2.10 mmwide; eyes small, 1/3 as long as temples; front margin with obtuse lateral teeth and a smoothly curved central prominence; densely and distinctly punctate; distance between punctures on average as wide as diameter of punctures; with several granular supraocular punctures and striae; surface with distinct netlike microsculpture; slightly shiny.  AntennaeAntennaewith 2 ndantennomere oval distinctly shorter than conical 3 rdone; antennomeres 4 to 6 longer than wide; subsequent ones more or less quadrate.  Pronotum: 1.85 mmlong, 2.30 mmwide; widest at anterior edge; anterior angles tooth-like prominent; smoothly narrowed to posterior edge; in front of posterior angels slightly emarginate; lateral margin small at anterior angles and widened distad to posterior angels; midline deeply depressed beginning in anterior third and ending in front of posterior edge; surface with netlike or partly longitudinally reticulate microsculpture; slightly shiny.  Elytra: 2.10 mmlong, 2.30 mmwide; with coriaceous ground sculpture and weak and sparse punctation.  Abdomenwithout dorsal punctation.  Front legslegswith 9 spines at outer edge; apical 4 ones on larger teeth; a row of approximately 10 hairs parallel to outer edge and a second row with few setae at inner side.  Aedeagusbroad and nearly circular with short apical part; apical part extremely asymmetric pointing to left side; suddenly narrowed in front of acute apex. [106,1060,554,579] 1908-04-16 AMNH F. Knab Mexico 18.716667 Omelaca 1274 -96.75 19 382 1 1 holotype [106,928,645,665] AMNH Mexico 20.016666 Santa Lucia 1269 -97.51667 19 382 1 Puebla 1952-01-09 1972-11-24 1952-01-09 AMNH, UIC Creighton & J. Reddell Mexico 16.6 10 mi. E Xititla 1281 -91.61667 19 382 5 San Luis Potosi [408,1093,702,724] 1990-07-07 AMNH Danoff-Burg Mexico Xilitla Castle Ingles 19 382 1 San Luis Potosi [106,694,731,753] 1967-08-08 ANHM, UIC J. Reddell Mexico Tlilipan 19 382 2 San Luis Potosi