Osoriellus macrops Irmler 2014, n. sp.
Creators: name: Irmler, Ulrich
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Osoriellus
Osoriellus macrops

description: Osoriellus macrops n. sp.
(Figs 35 A-C, 41E)
Type material: Holotype, male: Brazil: Amazonas, Reserva Ducke (59°55'W, 2°52'S), 26 km NE Manaus, flight intercept trap, 1995-1996 (BMNH).
Paratype: Brazil: Amazonas, Manaus, female, 26.10.1955, leg. Elias & Roppa (UIC).
Diagnosis: The species mostly resembles O. solidus and can be hardly differentiated from that species. In contrast to O. solidus, the microsculpture of the posterior tergites is dense and distinct and the surface is matt. Additionally, remains of isodiametric microsculpture are found on the pronotum in O. macrops, but not in O. solidus.
Description: Length: 7.0 mm. Colouration: Black; legs and antennae brown.
Head: 0.91 mm long, 1.59 mm wide; eyes thick and distinctly prominent; approximately 1.5 times as long as temples; sides of fore-head narrowed to anterior angles in deep sinuate curve; anterior edge of clypeus even; punctation coarse and moderately dense; large punctures without setae, except few punctures on clypeus, two on vertex and few on supraocular area; partly coriaceous; interstices between punctures irregularly wide; on average, much smaller than diameter of punctures; without impunctate midline; close to neck with narrow transverse impunctate area; without microsculpture; surface shiny.
Antennae slightly shorter than head and half of pronotum combined; second antennomere oval; slightly thicker and longer than conical third antennomere; following antennomeres increasing in width; fourth antennomere slightly longer than wide, fifth quadrate and following antennomeres slightly wider than long.
Pronotum: 1.42 mm long, 1.67 mm wide; widest at anterior angles; anterior angles rectangular; sides narrowed to posterior angles in even slightly convex curve; posterior angles obtuse; smoothly rounded; lateral margin fine in anterior half; slightly widened to posterior angles; in dorsal aspect, covered close to anterior angles; punctation coarse and moderately dense; without setae; impunctate midline in anterior half extremely narrow; in posterior half slightly wider; on average, interstices between punctures slightly shorter than diameter of punctures; between coarse punctation with dense micro-punctation; isodiametric microsculpture weak; hardly visible; surface shiny.
Elytra: 1.77 mm long, 1.76 mm wide; shoulders obtuse, but nearly rectangular; sides slightly widened to posterior third; punctation approximately as dense and coarse as on pronotum; without setae; coriaceous ground-sculpture weak; less deep than punctures.
Abdomen with dense and moderately deep punctation; punctures without setae; punctation on distal tergites denser than on apical tergites; punctures on tergites VII and VIII elongate; microsculpture on apical tergites netlike and weak; microsculpture on tergites VII and VIII densely elongate and deep; apical tergites shiny; distal tergites matt.
Protibia: 0.79 mm long, 0.28 mm wide; outer edge with 9 spines; apical spines on long digits; WLR: 0.49; in posterior aspect, comb of inner emargination totally visible; posterior face sparsely covered by long yellow setae; on average, setae half as long as protibial width or slightly longer.
Aedeagus with long and slender apical lobe; apical lobe much longer than basal lobe; ending in shortly rounded apex; inner edge of apical lobe with sparse row of sensillae.
Etymology: The specific name is a combination of the epithet macro meaning large and ops meaning eye and refers to the large eyes of the species.
description: Published as part of Irmler, Ulrich, 2014, The Neotropical species of the genus Osoriellus FAGEL, 1959 (Coleoptera: Staphylinidae: Osoriinae), pp. 231-354 in Beiträge Zur Entomologie = Contributions to Entomology 64 (2) on page 254, DOI: 10.21248/contrib.entomol.64.2.231-354, http://zenodo.org/record/5461706