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

description: Osoriellus diversus n. sp.
(Figs 37 A-C, 41D)
Type material: Holotype, male: Peru: Dept. Loreto, Campamento San Jacinto (75°51.77'W, 2°18.75'S), 175-215 m elevation, collected by flight intercept trap, 9.7.1993, leg. R. Leschen (KNHM).
Paratype: Peru: Madre de Dios, Pantiacolla Lodge, 5.5 km NW El Mirador Trail, Alto Madre do Dios River (71°15.28'W, 12°39.1'S), 500 m elevation, collected by flight intercept trap, male, 23- 26.10.2000, leg. R. Brooks (UIC); Dept. Loreto, 1.5 km N. Teniente Lopez (76°06.92'W, 2°35.66'S), 210-240 m elvetion, collected by flight intercept trap, male, 20.7.1993, leg. R. Leschen (KNHM).
Diagnosis: O. diversus closely resembles O. solidus concerning the polished surface, the obtuse posterior angles of the pronotum and the dense pronotal micropunctation. In contrast to O. solidus, O. diversus is smaller and the posterior angles of the pronotum are more widely rounded.
Description: Length: 6.4 mm. Colouration: Black; legs and antennae dark brown; elytra dark reddish.
Head: 0.87 mm long, 1.28 mm wide; eyes slightly prominent; longer than temples; fore-head deeply emarginate; sides of clypeus parallel; anterior edge of clypeus widely emarginate; thus, angles slightly produced; punctation deep and irregular; large area on vertex and at base of antennae impunctate; two pairs of setiferous punctures each on both clypeus on line between posterior edge of eyes on supraocular area; punctures on supraocular and postocular area partly coriaceous and striate; much denser than normal punctation; extremely weak remains of microsculpture; surface nearly polished and shiny.
Antennae as long as head and one third of pronotum combined; second antennomere oval and elongate; third conical and slightly shorter than second; fourth antennomere also conical and slightly shorter than third; following antennomeres increasing in width, but all approximately quadrate.
Pronotum: 1.21 mm long, 1.36 mm wide; widest at anterior angles; slightly narrowed in even curve to posterior angles; posterior angles distinct, but obtusely rounded; lateral margin finer in anterior half than in posterior half; in dorsal aspect, not visible close to anterior angles; slightly widened near posterior angles; punctation deep and moderatly dense; on average, interstices between punctures as long as diameter of punctures; without distinct impunctate midline; few setiferous punctures along anterior margin and one pair of setiferous punctures in posterior half; between normal coarse punctation with micro-punctation; very weak remains of netlike microsculpture; surface nearly polished, shiny.
Elytra: 1.47 mm long, 1.45 mm wide; widest in posterior third, but sides nearly parallel; punctation coarse and dense; coriaceous ground-sculpture weak.
Abdomen with sparse punctation on tergites III – VI and weak microsculpture; surface shiny; punctation on tergites VII and VIII much denser and punctures elongate; surface with dense longitudunal reticulate microsculpture; surface matt.
Protibia: 0.78 mm long, 0.21 mm wide; 8 spines on outer edge; apical 4 spines inserting on long teeth; WLR: 0.57; in posterior aspect, inner emargination with comb distinctly visible throughout its total length; posterior face sparsely covered by long yellow setae.
Aedaegus with thick basal and apical lobe; apex of apical lobe thick and obtusely rounded; four sensillae at apex and row of sensillae at inner edge of apical lobe.
Etymology: The specific name diversus derives from the same Latin word and means different. It refers to the varying size of punctures on the pronotum.
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 252, DOI: 10.21248/contrib.entomol.64.2.231-354, http://zenodo.org/record/5461706