Osoriellus brevipennis ( NOTMAN, 1925 ) 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 : 261-262

Osoriellus brevipennis ( NOTMAN, 1925) new combination

( Figs 76 A-C, 99C)

Osorius brevipennis NOTMAN, 1925: 7

Type material examined: U.S. A: Arizona, Fort Grant , 12.7. without year, leg. Hubbard & Schwarz (holotype in USNHM) .

Further material examined: America septentrionalis: syntype to O. latipes ( ZMHB) ; Mexico: Mexico, Real de Arriba , 6300 ft. elevation, 13 specimens, 1.07.1932, leg. H.E. Hinton ( AMNH) ; Mexico, 1 male, leg. Höge, 2 males, 4 females, coll. Kraatz, without more data ( SDEI) ; Nicaragua: Rio San Juan, 60 km SE San Carlos, Refugio Bartola (84°20.30'W, 10°58.40'N), ex. fruitfall, 100 m elevation, 29.5.2002, leg. R. Brooks, Z. Falin, S. Chatzimanolis ( UIC); Costa Rica: Prov. San José, La Caja, male, July 1938, leg. A. Bierig ( BMNH); nr. Salitral , nr. San José, 1200 m elevation, under rocks at edge of stream, 1 male, 1 female, 14.2.1982 and 4.3.1982, leg. G. Kirby & Speight ( BMNH) .

Diagnosis: The species is very similar to O. mexicanus and can be differentiated from that species by the microsculpture of the head and the extremely triangular shape of the pronotum.

Description: Length: 5.4 mm. Colouration: Black; legs and antennae reddish; elytra red.

Head: 0.75 mm long, 1.1 mm wide; eyes not prominent; as long as temples; front edge of clypeus even without lateral teeth; setiferous punctures moderately dense; wide impunctate midline; laterally and anteriorly with denser granulate punctation; in particular, on supraocular area with dense granulate, partly striate punctures; at base of antennae with further large impunctate area; surface with dense and distinct isodiametric microsculpture, matt; without microsculpture except impunctate area at base of antennae; surface polished.

Antennae with second and third antennomere nearly similar in length; second antennomere oval; third conical; following antennomeres narrow and quadrate; antennomeres seven to eleven much wider than preceding antennomeres and slightly wider than long.

Pronotum: 1.00 mm long, 1.15 mm wide; widest at anterior edge; evenly convergent to posterior angles; lateral and posterior margin narrow; punctures large and dense; along impunctate midline with row of coriaceous punctures; between coarse punctation with sparse micropunctation; surface without microsculpture; polished.

Elytra: 1.15 mm long, 1.15 mm wide; with moderately deep coriaceous ground-sculpture; punctures large and dense, but slightly smaller than on pronotum; punctures in irregular rows.

Abdomen with dense and deep setiferous punctation; surface with distinct isodiametric microsculpture; matt.

Protibia: 0.79 mm long, 0.29 mm wide; thick, nearly semicircular; with 10 spines on outer edge; WLR: 2.0; in posterior aspect, comb at inner emargination partly covered; posterior face densly coverd by yellow setae.

Aedeagus elongate; apical lobe slender and slightly curved to moderately obtuse apex; one sensilla at inner edge of apical lobe.

Figures

Fig. 73-78: Osoriellus-s. str.-group: Osoriellus frater (73), O. latipes (74); O. mexicanus (75), O. brevipennis (76), O. argentinus (77), O. crassus (78); antenna (A), protibia (B), aedeagus in lateral aspect (C); scale bar: 0.1 mm.