Osoriosetus hanagarthi, Irmler, 2015

Irmler, Ulrich, 2015, New Neotropical genera and species of the tribe Osoriini (Coleoptera: Staphylinidae: Osoriinae), Beiträge Zur Entomologie = Contributions to Entomology 65 (1), pp. 173-196 : 182

Osoriosetus hanagarthi spec. nov.

( Figs 11A–C , 17A )

Type material: Holotype male: Peru, Huanuco, Panguana (74°56'W, 9°37'S), Cocha, May 1975, leg. W. Hanagarth ( UIC).

Paratypes: Panguana (74°56'W, 9°37'S), river margin, female, 05.01.1976, leg. W. Hanagarth ( UIC) .

Etymology: The species is named in honour of my dear colleague Dr. Werner Hanagarth, who unfortunately passed away too early. Among the extensive material collected by him in Panguana, this interesting species was found, which could not be integrated in one of the described genera.

Description: Length, 5.3 mm; colouration, black; legs and antennae light brown.

Head: 0.67 mm long, 0.90 mm wide; eyes small, but prominent; temples nearly three times longer than eyes; sides of fore-head narrowed to anterior angles in short concave curve; anterior edge of clypeus even; slightly convex; setiferous punctation coarse and dense; on average, interstices between punctures less than half of diameter of punctures; setae short; not much longer than one interstice between punctures; small area at antennae and large transverse area on neck impunctate; on punctate areas with isodiametric deep microsculpture; surface matt; impunctate areas shiny.

1. Eyes thick and prominent; semicircular ......................................................................................... O. politum spec. nov.

- Eyes not prominent ............................................................................................................................................................. 2

2. Posterior angles of pronotum widely rounded; elytra wider than long ....................................................................... 3

- Posterior angles of pronotum nearly rectangular; elytra longer than wide .................... O. schwarzi NOTMAN, 1925

3. Front of clypeus angulate ....................................................................................... O. exalatum ( BLACKWELDER, 1943)

- Front of clypeus rounded ..................................................................................... O. microptera ( BLACKWELDER, 1943)

Figures

Fig. 10–14: Tumboecus struyvei (10); Osoriosetus hanagarthi (11), Neosorius brasiliensis (12), N. mexicanus (13), Paratrochus tilli (14); antenna (A), protibia in posterior aspect (B), aedeagus (C); antenna (A), protibia in posterior aspect (B), aedeagus (C); scale bar: 0.1 mm.

Fig. 17: Head, pronotum, and elytra of Osoriosetus hanagarthi (A) and Tavakilianidia anophtalma (B); scale bar: 0.5 mm.