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

description: Osoriellus surinamensis n. sp.
(Figs 55 A-C, 96A)
Type material: Holotype, male: Suriname: Brokopondo, Brownsberg Nature Preserve (55°10.53'W, 4°56.55'N), ca. 440 m elevation, ex flight intercept trap, 22.-25. Jun. 1999, leg. Z.H. Falin, #SUR1F99 (KNHM).
Diagnosis: According to the size and microsculpture of the pronotum, the species resembles O. micros and O. brevicornis. Compared to both species, the eyes are more prominent, the pronotal punctation is denser and the antennae are thicker. In particular, the antennomeres 2 to 6 are distinctly thicker than in O. micros and O. brevicornis.
Description: Length: 3.8 mm. Colouration: Dark reddish; pronotum and abdomen slightly lighter reddish; legs and antennae yellow.
Head: 0.47 mm long, 0.72 mm wide; eyes prominent; slightly longer than temples; sides of fore-head convergent in concave curve to anterior angles; anterior edge of clypeus even with short granules at angles; setiferous punctation deep and moderately dense; on average, interstices between punctures slightly shorter than diameter of punctures; on supra- and postocular area few punctures with longer setae; netlike microsculpture dense and deep; surface matt.
Antennae slightly longer than head; second antennomere globular and thicker than conical third; antennomeres 4 to 6 as wide as third antennomere, but shorter; wider than long; antennomeres 7 to 10 distinctly wider than preceding antennomeres; approximately 1.5 times wider than long.
Pronotum: 0.69 mm long, 0.75 mm wide; widest at anterior angles; evenly convergent to posterior angles except slight emargination in anterior third and in front of posterior angles; lateral margin fine; finer in anterior half than in posterior half; in dorsal aspect, from anterior emargination to anterior angles not visible; setiferous punctation large and denser than on head; punctures in irregular rows; on average, interstices between punctures half as wide as diameter of punctures; impunctate midline at posterior edge twice as wide as at anterior edge; netlike microsculpture weaker than on head; surface, thus, more shiny than on head.
Elytra: 0.88 mm long, 0.82 mm wide; with rounded shoulders; setiferous punctation dense and deep; in irregular rows; weak coriaceous ground-sculpture and irregular, distinct microsculpture; surface matt.
Abdomen as densely and deeply punctate as elytra; punctures with yellow setae; narrow midline impunctate and shiny; anterior segments on punctate area with microsculpture; surface matt; segements VII and VIII without microsculpture; surface polished and shiny.
Protibia: 0.46 mm long, 0.14 mm wide; 10 spine on outer edge; WLR: 6.0; in posterior aspect, comb at inner emargination shortly covered in middle; posterior face with dense setation; setae nearly half as long as protibial width. Aedeagus with slightly curved apical lobe; apical lobe approximately in line with basal lobe; 6 sensillae at inner edge.
Etymology: The specific name derived from the country, where the species was collected.
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 pages 288-289, DOI: 10.21248/contrib.entomol.64.2.231-354, http://zenodo.org/record/5461706