Osoriellus laeviusculus Irmler 2014, new combination

Osoriellus laeviusculus (BERNHAUER, 1920) new combination

(Figs 3 A-B, 5B)

Osorius laeviusculus BERNHAUER, 1920: 9

Type material examined: Brazil: Santa Catharina, female without further date, leg. Klimsch (holotype in FMNH).

Further material examined: Brazil: São Paulo, 2 females, without further data, leg. J. Mráz (NHMP).

Diagnosis: Concerning the absence of the setiferous punctation and the impunctate pronotal midline, the species is most related to O. schubarti. It can be differentiated from that species by the smaller size and the even anterior margin of the clypeus.

Description: Length: 4.8 mm. Colouration: black, posterior edge of pronotum reddish, elytra dark brown, legs and antennae yellow.

Head: 0.55 mm long, 0.90 mm wide; front edge of the clypeus even; clypeal angles produced into short teeth; eyes large and prominent, nearly twice as long as temples; with several supraocular setae and a fine punctation; interstices between punctures on average as wide as or slightly wider than diameter of punctures; punctures without setae; with fine and dense transverse microsculpture; surface nearly dull.

Antennae with first antennomere as long as following three, second antennomere oval and as long as conical third one; antennomeres four to six more or less quadrate; the following 4 antennomeres much larger and wider than long.

Pronotum: 1.00 mm long, 1.00 mm wide; widest at anterior edge; anterior angles not prominent; sides slightly narrowed to posterior angles; nearly parallel in the anterior half; stronger narrowed shortly in front of the posterior angles: lateral margin extremely fine; punctation deeper than on head, but sparser; interstices between punctures on average twice as wide as diameter of punctures; a moderately wide midline impunctate; on central disc, on each side of the midline with circular depression; microsculpture longitudinal; surface slightly shiny, more shiny than surface of head.

Elytra: 1.10 mm long, 1.00 mm wide; with weak coriaceous ground-sculpture and fine and sparse punctation; punctures without setae; surface slightly shiny.

Abdomen finely and sparsely punctate; punctures with short yellow setae pointing to the middle; wide midline impunctate.

Protibia: 0.53 mm long, 0.13 mm wide; with 7 spines on outer edge; apical spine on moderately long digits; WLR: 0.70; in posterior aspect, comb at inner emargination visible throughout ist total length; on anterior face with row of five setae; posterior face sparsely covered with long yellow setae.

Aedeagus unknown.