Osoriellus asperatus, 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 : 259-260

publication ID

https://doi.org/ 10.21248/contrib.entomol.64.2.231-354

DOI

https://doi.org/10.5281/zenodo.5461432

persistent identifier

https://treatment.plazi.org/id/E01A87D0-FFD1-FFD9-4DB4-F8BDFEF9FE06

treatment provided by

Felipe

scientific name

Osoriellus asperatus
status

sp. nov.

Osoriellus asperatus View in CoL n. sp.

( Figs 67 View Fig A-C, 95F)

Type material: Holotype, male : Brazil: Amazonas, Manaus, INPA/Smithsonian Reserve 2 (59°50'W, 2°25'S), leaf litter of terra firme forest, collected by Winkler method, male, January 1994, leg. R. Didham ( BMNH). GoogleMaps

Paratypes: Brazil: with same data as for holotype, 3 females, 1 male, January 1994, February 1994, March 1994 ( BMNH, UIC); GoogleMaps Reserva Ducke , 26 km NE of Manaus, flight intercept trap, female, 1995-1996 ( BMNH) GoogleMaps .

Diagnosis: The species is characterised by the dense coriaceous punctation of the pronotum that is so far unique in the Neotropical Osoriellus species.

Description: Length: 3.4 mm. Colouration: Black, anterior half of elytra dark red.

Head: 0.43 mm long, 0.69 mm wide; eyes thick and distinctly prominent; nearly twice as long as temples; sides of fore-head convergent to anterior angles; not sinuate; anterior edge of clypeus even; extremely dense setiferous punctation deep and coariaceous; interstices between punctures less than one fifth as wide as diameter of punctures; yellow setae long; only small area at base of antennae impunctate.

Antennae slightly shorter than head and half of pronotum combined; second antennomere oval and distinctly thicker than third antennomere; 1.5 times as long as third antennomere; following antennomeres increasing in width; third and fourth antennomeres approximately quadrate; following antennomeres wider than long; eighth antennomere 1.5 times as wide as long; tenth antennomere only slightly wider than long; surface matt.

Pronotum: 0.67 mm long, 0.70 mm wide; widest near anterior angles; sides approximately parallel in anterior half; in posterior half, more strongly and evenly narrowed to posterior angles; slightly sinuate shortly in front of posterior angles; posterior angles nearly rectangular; lateral margin fine; in posterior half, slightly wider than in anterior half; in dorsal aspect, hardly visible in anterior half; extremely dense setiferous punctation deep and coarse; partly coriaceous; punctures larger than on head; interstices between punctures one fifth as wide as diameter of punctures; wide, parallel midline impunctate; yellow setae at least as long as three times of diameter of punctures; without microsculpture; surface matt.

Elytra: 0.78 mm long, 0.75 mm wide; widest near middle; shoulders nearly rectangular; setiferous punctation less dense than on head and pronotum, but also deep and coarse; on average, interstices between punctures as wide as half of diameter of punctures; on average, yellow setae as long as double diameter of punctures; coriaceous ground-sculpture weak; surface matt.

Abdomen as densely and deeply punctate as fore-body; surface matt.

Protibia: 0.34 mm long, 0.12 mm wide; with 7 long spines on outer edge; apical spines inserted on short and wide digits; WLR: 3.1; in posterior aspect, comb at inner emargination totally visible; posterior face with moderately dense setation; yellow setae approximately as long as half of width of protibia.

Aedaegus with thick basal lobe and short and thick apical lobe; apical lobe narrowed to obtuse, widely rounded apex; on inner edge of apical lobe, one sensilla in apical third and four sensillae in basal third.

Etymology: The specific name derived from the same Latin word meaning coarse and refers to the coarse punctation of the species.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Osoriellus

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