Osorius morio NOTMAN , 1925: 18

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 : 392-393

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



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Osorius morio NOTMAN , 1925: 18


Osorius morio NOTMAN, 1925: 18 View in CoL (Figs 28 a-c)

Type material examined:

Mexico: Veracruz, Omealca (96°45' W, 18°43' N), 1 male, April 16, 1908, leg. F. Knab (holotype, NHMW) GoogleMaps .

Additional material examined:

Mexico: Pipiapan (95°03' W, 18°27' N), carrion trap, 1 specimen, 15.2.1991, leg. Morón ( KU) GoogleMaps ; 4 km W Sontecompan (95°59' W, 18°30' N), 1 specimen, 10.4.1966, leg. G.E. Ball ( KU) GoogleMaps ; Cordoba (96°55' W, 18°53' N), 1 specimen, 12.6.1908 ( AMNH) GoogleMaps ; Oaxaca, Palenque (91°58'W, 17°29'N), under bark, 200 m elevation, 4 specimens, 24.4.1993, leg. R.W. Brooks ( KU, UIC) GoogleMaps ; Jalapa (92°48' W, 17°42' N), 9 specimens without date, leg. W. Schaus ( AMNH) GoogleMaps ; Veracruz (96°16 W, 19°11 N), Las Cabanas, Monte Pio Veracruz, 19.1.1980, leg. Espinoza ( UNAM) GoogleMaps .


O. morio is a medium-sized species without micro-punctation, but with dense microsculpture and matte surface. In this respect, it resembles a large number of species from which it can be hardly distinguished. Certain identification can be achieved only by a genital dissection. The apical part of the aedeagus is extremely long compared to the basal part. It ends in a thick, obtuse apex that is lighter in colour in comparison to the remaining aedeagus.


Length: 9.5 mm. Colour: black; legs and antennae dark brown.

Head :: 1.4 mm long, 2.0 mm wide; eyes small; shorter than temples; anterior half distinctly narrowed to front edge; anterior edge of clypeus undulate and with pair of broad teeth; in centre smoothly prominent; punctation dense and distinct; only at base of antennae impunctate; distance between punctures on average shorter than diameter of punctures; with several supraocular granular and setiferous punctures; with several short striae behind eyes; surface with weak isodiametric microsculpture, shiny; in addition to supraocular setiferous punctures, a pair of setae on disc at anterior edge of eyes, near neck, and at posterior edge of clypeus.

AntennaeAntennae with 2 nd antennomere oval; conical 3 rd 1.5 times longer than 2 nd; antennomeres 4 and 5 slightly longer than wide; subsequent antennomeres increasing in length, but more or less quadrate.

Pronotum: 1.5 mm long, 2.1 mm wide; widest at anterior edge; anterior angles tooth-like prominent; sides in anterior half slightly narrowed, in posterior half strongly narrowed; slightly emarginate in front of posterior angles; lateral margin narrow shortly behind anterior tooth; distad widened and widest in front of posterior angles; punctation less dense than on head; distance between punctures on average as wide as or wider than diameter of punctures; a small impunctate midline with a short groove in posterior half; surface with weak netlike microsculpture, more distinct than on head and, thus, less shiny.

Elytra: 2.0 mm long, 2.0 mm wide; with coarse punctation; punctures distinctly larger than on pronotum; with weak coriaceous ground sculpture, and longitudinally striate in anterior half; surface shiny.

AedeagusAedeagus nearly triangular in shape with thick and long apical part ending in a thick obtuse apex which is lighter in colour than remaining aedeagus.


Naturhistorisches Museum, Wien


Biodiversity Institute, University of Kansas


American Museum of Natural History


Universidad Nacional Autonoma de Mexico














Osorius morio NOTMAN , 1925: 18

Irmler, Ulrich 2010

Osorius morio

NOTMAN, H. 1925: 18
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