The Neotropical species of the genus Osorius G - M, 1829 with remarks to the Neotropical Osoriid complex (Coleoptera: Staphylinidae: Osoriinae) Author Irmler, Ulrich text Beiträge Zur Entomologie = Contributions to Entomology 2010 2010-12-20 60 2 363 426 https://www.contributions-to-entomology.org/article/view/1782 journal article 10.21248/contrib.entomol.60.2.363-426 0005-805X 5212736 Osorius laevicollis BERNHAUER ,, 1908: 294 ( Figs 17 a-c) Type material examined: Bolivia : Lima : Mapiri ( 68°09' W , 15°15' S ) 1 male without further data ( holotype , FMNH ) . Additional material examined: Ecuador : Sucumbios , Sacha Lodge ( 76°27' W , 0°28' S ), under bark, 270 m elevation, 1 specimen , 24.3.1999 and in fruit fall, 1 specimen , 23.3.1999 leg. R.W. Brooks ( KU ) ; Esmeraldas , Bilsa , 1 specimen , 5.6.1996 , leg. P. Hibbs ( KU ) ; Peru : Loreto , Boqueron del Padre Abad , 470 m elevation, 13 specimens , 8.8.1946 , leg. F. Woytkowski ( AMNH , UIC ) ; Junin , La Merced , Villa Rica Road ( 75°18' W , 10°47' S ), flight intercept trap , 1450 m elevation, 1 specimen , 15.10.1999 and 9.5 km NE Villa Rica Rd. , 880 m elevation, 1 specimen , 15.10.1999 , leg. R.W. Brooks ( KU ) ; Madre de Dios , Pantiacolla lodge ( 71°16' W , 12°38' S ), 8 km NW El Mirador , under bark, 950 m elevation, 1 specimen , 24.10.2000 , leg. R.W.Rrooks ( KU ) ; Piura , Divisoria Huan , 1 specimen , 8.8.1946 , leg. F. Woytkowski ( AMNH ) ; Ucayali , Aguaytia , 295 m elevation, 2 specimens , 15.9.1946 , leg. F. Woytkowski ( AMNH ) . Diagnosis: O. laevicollis is similar in size to O. dentatus , O. costaricensis and O. sublaevis , but is, on average, slightly larger than these species.The dense microsculpture and matte pronotal surface resembles that of O. costaricensis and O. sublaevis , but pronotal punctation is distinctly larger and denser. In contrast to O. costaricensis , the apex of the aedeagus is extremely acute and long. Description: Length : 7.8 mm . Colour : black, legs and antennae reddish brown. Head :: 1.2 mm long, 1.5 mm wide; front edge laterad without prominence, but with a wide emargination centrally; punctation dense and moderately deep; on disc, distance between punctures shorter than diameter of punctures; with sparser punctation on clypeus; a small midline and an area above base of antennae impunctate; surface with very weak isodiametric microsculpture; shiny; with several supraocular granular setiferous punctures; with short longitudinal striae at temples behind eyes. AntennaeAntennae with 2 nd antennomere short and nearly circular; conical 3 rd antennomere only slightly longer than 2 nd ; antennomeres 4 to 10 increasing in width; 4 th antennomere quadrate; 10 th antennomere wider than long; relation length: width 0.77. Pronotum : 1.4 mm long, 1.6 mm wide; widest at anterior edge; sides slightly narrowed in anterior half; distad more distinctly narrowed and slightly emarginate in front of posterior, obtusely rounded angles; lateral margin narrow in anterior half, widened to posterior angles; punctation finer and distinctly sparser than on head; distance between punctures two to three times wider than diameter of punctures; a narrow midline impunctate, but with short central groove; surface with isodiametric microsculpture; slightly shiny. Elytra : 1.7 mm long, 1.6 mm wide; with deep coriaceous ground sculpture; punctation present, but scarcely visible between deep ground sculpture; in spite of deep ground sculpture, surface shiny. Abdomen with very sparse and fine punctation and weak, netlike microsculpture; surface shiny; tergites without setae. Front tibiatibia at outer edge with 9 spines; apical three ones inserting on short teeth. AedeagusAedeagus oval in shape with extremely short apical part suddenly narrowed in front of acute apex.