Osorius paganus, Irmler, 2010

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 : 395

Osorius paganus sp. n. ( Figs 14 a-c, 36 B, 38 D)

Type material:

Holotype, male: Columbia: Cundinamarca, Finca San Paulo, 3 km N Alban (74°26' W, 4°52' N), 1800 m elevation, 12.8.1967, leg. P. & W. Wygodzinsky ( AMNH).

Paratypes: 9 males, 12 females with same data as holotype ( AMNH, UIC) .

Diagnosis:

The species is very similar to O. venezuelanus . It can be differentiated from O. venezuelanus by the absence of clypeal teeth and less granular supraocular punctures. Moreover, microsculpture is deeper than in O. venezuelanusvenezuelanus and, thus, surface matte and not as shiny as in O. venezuelanus . It also resembles O. costaricensis in the fine punctation of the pronotum. But, in O. costaricensis , few postocular striae are developed that are absent in O. paganus . Furthermore, ground sculpture of elytra is deeper in O. costaricensis , although surface is shinier than in O. paganus .

Description:

Length: 7.5 mm. Colour: black.

Head :: 1.0 mm long, 1.4 mm wide; with slightly prominent eyes; temples slightly narrowed behind eyes; sides of clypeus widely emarginate to anterior edge; anterior edge of clypeus with smooth emargination; lateral prominences divided by a depressed setiferous puncture; with two or three setiferous granular supraocular punctures; another setiferous granular puncture near neck and between clypeus and disc; with fine and sparse punctation, nearly invisible between deep netlike microsculpture; surface matte; laterad without striae.

AntennaeAntennae with 2 nd antennomere oval; only slightly shorter than 3 rd antennomere; 3 rd antennomere conical; subsequent antennomeres slightly wider than 2 nd and 3 rd one; antennomeres 4 to 7 slightly longer than wide; penultimate antennomeres quadrate.

Pronotum: 1.4 mm long, 1.6 mm wide; widest at slightly prominent anterior angles; lateral margin narrow in anterior half; from middle to posterior angles widened; posterior angles obtusely rounded; with very indistinct depressions at posterior angles; a setiferous puncture near margin in posterior third; punctation fine and sparse; distance between punctures at least 3 to 4 times wider than diameter of punctures; with deep netlike microsculpture; surface matte.

Elytra: 1.7 mm long, 1.7 mm wide; with one setiferous puncture in posterior part, but without visible punctation; with fine coriaceous ground sculpture; surface as matte as on pronotum.

Abdomen without punctation, but with fine microsculpture; distinctly shinier than fore-body; last abdominal tergite nearly polished and with few setiferous punctures.

AedeagusAedeagus slightly elongate with extremely long straight apical part ending in an acute apex; apical part slightly asymmetric; pointing to right side.

Etymology:

The specific name derived from the same Latin word meaning “in the country”.

Figures

Fig. 14: Osorius paganus. - Fig. 15: O. venezuelanus. - Fig. 16: Osorius pusillus (a: front body, b: antenna, c: aedeagus in ventral and lateral aspect, d: clypeus with labrum; scale bar: a, b: 1 mm, c: 0.2 mm, d: 0,5 mm).