Neosorius brasiliensis Irmler 2015, spec. nov.
Creators: name: Irmler, Ulrich
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Neosorius
Neosorius brasiliensis

description: Neosorius brasiliensis spec. nov.   
(Figs 12A–C, 16E)  
 Type material: Holotype male: Brazil, Minas Gerais, Govenador Valadares (41°56'W, 18°51'S), leaf litter, 26.3.1981, leg. L. Sorkin (AMNH).   
Paratype: Brazil, Rio de Janeiro, Ipanema, collected by light fixture, female, 13.9.1982, leg. L. Sorkin (UIC).  
 Etymology: The specific name is derived from the country, where the species was found.   
 Description: Length: 4.4 mm. Colouration: Black; legs reddish brown, antennae slightly lighter reddish brown.   
Head: 0.67 mm long, 0.92 mm wide; eyes prominent; as long as temples; sides of fore-head narrowed to anterior angles of clypeus in slight concave curve; anterior edge of clypeus even; surface of clypeus finely, but distinctly striate; vertex with coarse longitudinal striae ending on line with posterior edge of eyes; neck without striae; only with fine transverse micro-reticulation; within striae sparse setiferous punctation; setae as long or slightly longer than interstices between punctures; small area at base of antennae without punctures and striae; surface matt.  
Antennae slightly shorter than head and half of pronotum combined; second antennomere oval; nearly twice as long as wide; third antennomere conical and slightly shorter than second; following antennomere increasing in width, but all approximately quadrate or slightly wider than long.  
Pronotum: 0.85 mm long, 1.00 mm wide; widest shortly behind anterior angles; anterior angles obtuse; sides narrowed to posterior angles in smooth convex curve; posterior angles obtuse and smoothly rounded; lateral margin fine; in dorsal aspect covered close to anterior angles; continued to posterior margin; setiferous punctation moderately dense and deep; on average, interstices between punctures as wide as diameter of punctures; between normal punctation with fine micro-punctation; without microsculpture; surface shiny.  
Elytra: 1.07 mm long, 1.04 mm wide; widest in posterior third; shoulders rectangular, but rounded; setiferous punctation as dense and deep as on pronotum; coriaceous ground-sculpture weak; surface shiny.  
Abdomen with moderately dense setiferous punctation; punctures finer than on elytra and pronotum; narrow midline impunctate; netlike microsculpture weak; surface less shiny than on pronotum.  
Protibia: 0.53 mm long, 0.13 mm wide; with seven spines on outer edge; apical spines on long digits; WLR: 0.56; between spine two and three at apex with wider interstice than between other spines; posterior face with row of five spines; apical spines inserting on short digits; between spines with sparse setation; in posterior aspect, inner emargination with comb totally visible.  
Aedeagus with thick apical lobe; suddenly narrowed to obtuse apex; endophallus spiralled with three torsions.  
 Diagnosis: The species is characterised by the longitudinal striae of the head and the smoothly curved sides of the pronotum. Additionally, it is distinctly smaller than N. mexicanus. According to the descriptions of FAGEL (1959) it resembles species of the African Neosorius of the arebianus-group.
description: Published as part of Irmler, Ulrich, 2015, New Neotropical genera and species of the tribe Osoriini (Coleoptera: Staphylinidae: Osoriinae), pp. 173-196 in Beiträge Zur Entomologie = Contributions to Entomology 65 (1) on page 183, DOI: 10.21248/contrib.entomol.65.1.173-196, http://zenodo.org/record/4753843