Osoriellus levyi, Irmler, 2014

Irmler, Ulrich, 2014, The Neotropical species of the genus Osoriellus FAGEL, 1959 (Coleoptera: Staphylinidae: Osoriinae), Beiträge Zur Entomologie = Contributions to Entomology 64 (2), pp. 231-354 : 274

Osoriellus levyi n. sp.

( Figs 58 A-C, 96D)

Type material: Holotype, male: Ecuador: Napo Prov., Jatun Sacha Biol. Station , 21 km E Puerto Napo (77°36.48'W, 01°04.06'S), 400 m elevation, collected by flight intercept trap in virgin rain forest , 15.7.1994, leg. Levy & Genier ( KNHM).

Diagnosis: The species resembles O. bicolor in size, colouration and micro-punctation of the fore-body. The pronotal punctation in O. bicolor is much deeper and denser than in O. levyi . In O. bicolor , the interstices between the punctures are approximately half as wide as diameter of punctures, whereas they are at least as wide as diameter of punctures in O. levyi . The strong curved apical lobe of the aedeagus and the acute apex is characteristic for O. levyi , too.

Description: Length: 3.3 mm. Colouration: Dark brown; posterior margin of pronotum and clypeus yellow; legs and antennae yellow.

Head: 0.46 mm long, 0.63 mm wide; eyes slightly prominent and as long as temples; sides of fore-head deeply sinuate and convergent to anterior margin of clypeus; sides of clypeus parallel; anterior margin of clypeus even, without teeth at outer angles; setiferous punctation moderately dense; punctures large, but not deep; wide midline and area at base of antennae impunctate; on average, interstices between punctures as wide as diameter of punctures; without microsculpture except small areas with remains of extremely weak microsculpture; between coarse punctures with micro-punctation; surface shiny and mostly polished.

Antennae as long as head and half of pronotum combined; second antennomere oval and slightly longer than wide; conical third antennomere smaller than second and only as long as wide; following three antennomeres approximately as wide as third, but shorter; fourth antennomere quadrate, sixth nearly twice as wide as long; antennomeres 7 to 10 much thicker than preceding antennomeres and distinctly wider than long.

Pronotum: 0.65 mm long, 0.64 mm wide; widest at obtuse anterior angles; evenly and slightly narrowed to posterior smoothly rounded angles; lateral margin extremely fine; in dorsal aspect, visible throughout its total length; setiferous punctation moderately dense, but punctures larger and deeper than on head; wide midline impunctate; on average, interstices between punctures as wide as diameter of punctures; in row adjacent to midline, interstices between punctures shorter; without microsculpture; surface polished and shiny.

Elytra: 0.80 mm long, 0.72 mm wide; with deep and dense ground-sculpture; setiferous punctation in irregular rows; punctures hardly visible in ground-sculpture; on disc 4 rows of punctures.

Abdomen with dense setiferous punctation and narrow impunctate midline; with remains of microsculpture; surface moderately shiny.

Protibia: 0.35 mm long, 0.15 mm wide; nearly semicircular; 9 long spines at outer edge; WLR: 3.0; in posterior aspect, comb of inner emargination partly covered; setation on posterior face dense.

Aedeagus with long prominence in middle and strongly curved apical lobe ending in acute apex.

Etymology: The specific name derived from the collector of the species, Mr. Levy.

Figures

Fig. 58-62: Osoriellus-s. str.-group: Osoriellus levyi (58), O. loksai (59), O. bicolor (60), O. salvini (61), O. eggersi (62); antenna (A), protibia (B), aedeagus in lateral aspect (C); scale bar: 0.1 mm.