Osorius laevicollis 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 : 391

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https://doi.org/ 10.21248/contrib.entomol.60.2.363-426

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Osorius laevicollis BERNHAUER


Osorius laevicollis BERNHAUER View in CoL ,, 1908: 294 ( Figs 17 View Fig a-c)

Type material examined:

Bolivia: Lima : Mapiri (68°09' W, 15°15' S) 1 male without further data (holotype, FMNH) GoogleMaps .

Additional material examined:

Ecuador: Sucumbios, Sacha Lodge (76°27' W, 0°28' S), under bark, 270 m elevation, 1 specimen, 24.3.1999 GoogleMaps 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 GoogleMaps 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) GoogleMaps ; 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) .


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.


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.


Field Museum of Natural History


Biodiversity Institute, University of Kansas


American Museum of Natural History













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