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

description: Osoriellus subsinuatus n. sp.
(Figs 17 A-C, 20G)
Type material: Holotype, male: Peru: Tambopata Prov., 15 km NE Puerto Maldonado, ex. Flight intercept trap, 22.6.1989, leg. J.S. Ashe & R.A. Leschen, # 195 (KNHM). Paratypes: Peru: 3 females with same data as holotype, but 24.6.1989, #195, #246 and #249; Tambopata Prov., Dpt O. Madre de Dios, 15 km NE Puerto Maldonado, Maldonado Reserva Cuzco Amazónico (12°33'S, 69°03'W), 200 m elevation, Plot #Z2E14, ex flight intercept trap, 1 male, 1 female, 17.6.1989, leg. J.S. Ashe & R.A. Leschen, # 118, 2 females with same data, but #Z2E17, 15.6.1989, #065; 28.6.1989, #314 (KNHM, UIC).
Diagnosis: As in O. sinuatus and O. sinuatoangularis, slight emarginations are found at posterior angles in O. subsinuatus. Compared to those species, the emargination is smallest in O. subsinuatus. Furthermore, the pronotal microsculpture in O. subsinuatus is deeper and the surface, thus, less shiny and the punctation coarser and deeper than in O. sinuatus and O. sinuatoangularis.
Description: Length: 4.8 mm. Colouration: Black; elytra, posterior margin of pronotum, and legs reddish; antennae yellow.
Head: 0.66 mm long, 0.93 mm wide; eyes slightly prominent and slightly longer than temples; sides of fore-head narrowed to anterior margin in concave curve; angles of clypeus produced to acute teeth; setiferous punctation irregularly deep and dense; on fore-head sparser and weaker than on vertex and with impunctate midline; interstices between punctures as wide as diameter of punctures; on supraocular area, punctures partly coriaceous and granulate; distinct microsculpture netlike; surface slightly shiny.
Antennae slightly longer than head; second antennomere globular, third conical and shorter than second; antennomeres four to six quadrate and as thick as third antennomere; antennomeres seven to ten distinctly wider than preceding antennomeres; antennomeres 7, 9, and 10 quadrate, 8 wider than long.
Pronotum: 0.93 mm long, 1.01 mm wide; widest at anterior angles; evenly convergent to posterior angles; at anterior angles, lateral margin very fine and covered in dorsal aspect; lateral margin slightly widened to posterior angles; ending shortly in front of posterior angles; at posterior angles with short and weak emargination; setiferous punctation coarse and deep; punctation partly depressed as irregular longitudinal or diagonal impressions; impunctate midline; distinct netlike microsculpture; surface slightly shiny.
Elytra: 1.08 mm long, 1.01 mm wide; with dense setiferous punctation on coriaceous ground-sculpture; surface slightly more shiny than on pronotum.
Abdomen with impunctate midline and dense setiferous punctation on each side of midline; without microsculpture; surface polished and shiny.
Protibia: 0.58 mm long, 0.17 mm wide; nearly semicirular; with 9 spines on outer edge; apical spines not inserted on digits; WLR: 5.0; in posterior aspect, comb at inner emargination visible throughout its total length; posterior face densely covered by yellow setae.
Aedeagus with long apical lobe ending in obtusely rounded apex; inner edge with 8 sensillae.
Etymology: The specific name means slightly emarginate and refers to the short and weak emargination at posterior angles of 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 245, DOI: 10.21248/contrib.entomol.64.2.231-354, http://zenodo.org/record/5461706