Osoriellus boliviensis, 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: 260-262

publication ID

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

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scientific name

Osoriellus boliviensis

n. sp.

Osoriellus boliviensis   n. sp.

( Figs 68 View Fig A-C, 98D)

Type material: Holotype, male: Bolivia: Cochabamba, 67.5 km NE, Estacion Biol. Valle del Sajita (64°47.52'W, 17°06.33'S, Univ. de San Simon , 300 m elevation, male, 7.-9.Feb.1999, leg. F. Genier, #1 Biol 1 G99041 View Materials , collected by flight intercept trap ( KNHM). GoogleMaps  

Paratype: Peru: Huanuco, Sta. Panguana (74°56'W, 9°37'S), Rio Llullapichis , female, 11.-12.2008, leg. F. Wachtel ( UIC) GoogleMaps   .

Diagnosis: Concerning its size and absence of microsculpture on the pronotum, the species resembles O. minor   and O. tuxtlae   . It can be easily differentiated from these two species by the prominent eyes. Moreover, it differs from O. tuxtlae   by the wider pronotum and elytra. The shape of the pronotum and the elytra are very similar to O. minor   , but the pronotal punctation is distinctly sparser in O. boliviensis   than in O. minor   . In O. minor   the interstices between the pronotal punctures are approximately as wide as the diameter of the punctures, whereas in O. boliviensis   the interstices are nearly twice as wide as the diameter of the punctures.

Description: Length: 4.5 mm. Colouration: Brown; elytra lighter reddish; legs and antennae lighter brown.

Head: 0.57 mm long, 0.94 mm wide; eyes distinctly prominent and longer than temples; sides of fore-head narrowed to anterior angles in concave curve; sides of clypeus nearly parallel; apical margin even without granules at angles; setiferous punctation dense and deep with wide impunctate midline; interstices between punctures slightly smaller than half of diameter of punctures; on supraocular area punctation still denser, coriaceous and with granulate punctures; without microsculpture; surface shiny.

Antennae with flagellum as long as head and half of pronotum combined; with oblong second and conical third antennomere, both more or less quadrate; following antennomeres increasing in width, but all antennomeres more or less quadrate.

Pronotum: 0.93 mm long, 1.02 mm wide; widest at anterior angles; anterior angles not produced to teeth; smoothly convergent to posterior angles; posterior angles indistinct, obtuse; lateral margin in anterior half finer than in posterior half; in dorsal aspect, visible throughout its total length; setiferous punctation as deep, but sparser than on head; more or less equally dense on disc except wide impunctate midline; on average, distance between punctures approximately twice as wide as diameter of punctures; between normally coarse punctures with extremely fine micro-punctation; without microsculpture; surface polished and shiny.

Elytra: 0.98 mm long, 1.09 mm wide; with weak coriaceous ground-sculpture and weak setiferous punctation; punctures in irregular rows and hardly visible in ground sculpture.

Abdomen with dense and deep setiferous punctation; wide midline on tergite III to VIII impunctate; without or with weak remains of microsculpture; surface shiny, nearly polished.

Protibia: 0.50 mm long, 0.14 mm wide; slender; 8 long spines at outer edge; 3 apical spines inserted on short digits; WLR: 1.75; in posterior aspect, comb at inner emargination visible throughout its total length; posterior face with sparse setation.

Aedeagus with broad, slightly curved apical lobe; shortly narrowed in front of apex to obtuse apex.

Etymology: The specific name boliviensis   refers to the country, where the species was collected.

Osoriellus brevicornis ( NOTMAN, 1920)   new combination ( Figs 53A View Fig , 96F View Fig )

Osorius brevicornis NOTMAN, 1920: 698  

Type material examined: U.S.A.: Florida, Pensacola , female, 11.4.1914 (holotype in ANHM)   .

Diagnosis: The species resembles O. rugipennis   concerning the overall shape of the pronotum and the microsculpture, but microsculpture is weaker than in O. rugipennis   and the colouration is yellow and not dark brown. The most conspicuous character of O. brevicornis   are the short antennae with the wide third and fourth antennomeres and, in particular, the short, transverse antennomeres five and six. Moreover, the following antennomeres are distinctly thicker forming an indistinct club. According to NOTMAN (1920) the species occurred in southern U.S.A. and in northern Mexico, Colima, E. Chihuahua (106°04.13W, 28°29.30N), leg. Conradt. This place is located at the periphery of Chihuahua city which is in northern Mexico and part of the Nearctic region. As it was not found in southern Mexico, the species is assumingly not part of the Neotropical fauna.

Description: Length: 4.0 mm. Colouration: Head and abdomen brown, pronotum and elytra light red, legs and antennae yellow.

Head: 0.60 mm long, 0.80 mm wide; eyes large, but not prominent, as long as temples; disc with dense setiferous punctures except on wide midline and smaller spot at base of antennae; on average, interstices between punctures half as wide as diameter of punctures; surface with distinct netlike microsculpture, slightly shiny.

Antennae short, second antennomere oblong, longer than wide; third antennomere conical and distinctly shorter than second; fourth antennomere conical and still shorter than third; fifth and sixth antennomeres much wider than long, but distinctly smaller than following antennomeres; antennomeres seven to eleven much wider than preceding antennomeres; forming indistinct club.

Pronotum: 0.80 mm long, 0.85 mm wide; widest at anterior edge; evenly convergent in smooth curve to posterior angles; posterior edge two-third as wide as anterior edge, lateral and posterior margin fine; anterior edge not margined; with dense setiferous punctures, setae pointing to wide impunctate midline; on average, interstices between oblong punctures as long as longitudinal diameter of punctures; surface with netlike microsculpture; microsculpture slightly weaker than on head.

Elytra: 0.90 mm long, 0.90 mm wide; with deep coriaceous ground-sculpture and irregular rows of setiferous punctures, setae pointing to middle.

Abdomen with setiferous punctation dense and deep; setae pointing to middle.

Protibia: 0.43 mm long, 0.15 mm wide; with 8 spines at outer edge; apical 3 spines inserted on short digits; WLR: 1.75; anterior face with a row of 5 setiferous punctures; posterior face densely covered by long yellow setae.

Aedeagus unknown.

Osoriellus brevipennis ( NOTMAN, 1925)   new combination

( Figs 76 View Fig 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 GoogleMaps   ,

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.


The Educational Science Museum [=Kuwait Natural History Museum?]


American Museum of Natural History














Osoriellus boliviensis

Irmler, Ulrich 2014

Osorius brevipennis

NOTMAN, H. 1925: 7

Osorius brevicornis

NOTMAN, H. 1920: 698