The Neotropical species of the genus Osoriellus FAGEL, 1959 (Coleoptera: Staphylinidae: Osoriinae) Author Irmler, Ulrich text Beiträge Zur Entomologie = Contributions to Entomology 2014 2014-12-15 64 2 231 354 https://www.contributions-to-entomology.org/article/view/1859 journal article 2515 10.21248/contrib.entomol.64.2.231-354 5df8bd34-9c04-4499-afe0-018387e11ffb 0005-805X 5461706 Osoriellus multipunctatus n. sp. ( Figs 87 A-C, 101C) Type material : Holotype , male : Ecuador : Pichincha , Mindo , 10.6 km W. Mindo Road ( 78°45.14'W , 0°04.23'S ), 1375 m elevation, 26.- 29.3.1999 , leg. R. Brooks , D. Brzoska , #ECU1899065, ex. flight intercept trap ( KNHM ). Paratype : Bolivia : Cochabamba , Cochabamba , 109 km E Yungas ( Cochabamba-Villa Tunari Rd. ) ( 65°42.54'W , 17°08.52'S ), flight intercept trap , female, 8.- 12.2.1999 , leg. F. Genier , #BOL1G99060 ( UIC ) . Diagnosis : The species can be differentiated from the other similarily sized species by the large prominent eyes and the densely punctate pronotum. It closely resembles O. triangulatus . But the eyes in O. triangulatus are not prominent, the punctation of the pronotum is less dense and the shape of the body is more slender than in O. multipunctatus . Description : Length : 4.8 mm . Colouration : Dark brown, legs and antennae lighter brown. Head : 0.57 mm long, 0.97 mm wide; eyes large; twice as long as temples; sides of fore-head strongly convergent; anterior edge of clypeus only half as wide as interstice between eyes; anterior edge of clypeus even; setiferous punctation coarse and dense; on average, interstices between punctures less than half as wide as diameter of punctures; short central area on posterior vertex and at base of antennae impunctate; netlike microsculpture dense and distinct; surface slightly shiny. Antennae longer than head and half of pronotum combined; second antennomere oblong; third conical and as long as second; fourth antennomere slightly longer than wide; following antennomeres increasing in width, but all quadrate. Pronotum : 0.90 mm long, 0.99 mm wide; widest shortly behind anterior angles; anterior angles produced to extremely short acute granules; sides evenly convergent to widely ronded posterior angles; lateral margin fine; in dorsal aspect, visible throughout its total length; setiferous punctation coarse and dense, but not coriaceous; on average, interstices between punctures less than half as wide as diameter of punctures; wide midline impunctate; between setiferous punctures with sparse micro-punctation; netlike microsculpture weaker than on head; surface slightly shiny. Elytra : 1.13 mm long, 1.09 mm wide; with dense coriaceous ground-sculpture; dense setiferous punctation nearly invisible in ground-sculpture. Abdomen with moderately dense setiferous punctation; netlike microsculpture still weaker than on pronotum; surface moderately shiny. Protibia : 0.58 mm long, 0.18 mm wide; 9 spines on outer edge; WLR: 1.70; in posterior aspect, comb at inner emargination shortly covered in central part; posterior face densely coverd by yellow setae. Aedeagus with moderately thick apical lobe ending in obtuse apex; seven sensillae at inner edge of apical lobe. Etymology : The specific word is a combination of the Latin words multi meaning many and punctatus meaning punctate and refers to the densely punctate pronotum.