Osoriellus micros ( SHARP, 1887 ), 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: 278-279

publication ID

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

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scientific name

Osoriellus micros ( SHARP, 1887 )

new combination

Osoriellus micros ( SHARP, 1887)   new combination

( Figs 54 View Fig A-C, 95E)

Osorius micros SHARP, 1887: 682  

Type material examined: Panama: San Felix, leg. Champion (holotype in BMNH)   .

Further material examined: Mexico: Real de Arriba (93°52'W, 16°13'N), Temescaltepec, 1 female, 7.1934, leg. H.E. Hinton ( AMNH) GoogleMaps   ; Tamaulipas (98°55.50'W, 21°09.56'N), Rancho del Cielo , Gomes Farias, 1230 m elevation, 1 male, 4.7.1969, leg. J. Peck ( AMNH) GoogleMaps   ; Palenque , 26.- 28.3.1974, leg. C. Alteri ( UIC)   ; El Naranjo , 3.1.1950, leg. L.D. Beamer ( KNHM)   ; Guatemala: San José de   Guatemala (90°49'W, 13°55'N), 8 specimens, 22.01. 1930, leg. R.E. Blackwelder ( AMNH, UIC) GoogleMaps   ; El Salvador: La Libertad (89°19'W, 13°29'N); 1 female, 24.1.1930, leg. R.E. Blackwelder ( AMNH) GoogleMaps   ; Nicaragua: Granada, Res. Nat. Volcan Mombacho (85°56.8'W, 11°50.0'N), 1150 m elevation, flight interc., 3 specimens, 2.- 5.6.2002, leg. R.W. Brooks ( KNHM) GoogleMaps   ; Costa Rica: Guanacaste, Guanacaste Conservation Area, Cacao Field Station (85°27.0'W, 10°56.0'N), 1200 m elevation, sampled in wet montane forest litter, 6 males, 3 females 12.2.1996, leg. R. Anderson, #CR1 A96 006C ( KNHM) GoogleMaps   ; 1 male, 1 female, 15.2.1996, 3 males, 20.2.1996, 1 female, 14.2.1996, leg. R. Anderson ( KNHM)   ; from same location, 1100- 1200 m elevation, sampled leaf litter by berlese method, 1 male, 2 females, 4.5.1995, leg. R. Anderson ( KNHM)   ; Maritza Biological Station , 550 m elevation, flight interc., 1 specimen, 22.5.1993, leg. J.S. Ashe ( KNHM)   ; San José, Cerro Chompipe , 2 km N Monte de la Cruz (84°9.0'W, 9°53.30'N), 2000 m elevation, female, 13.6.1997, leg. R. Anderson ( KNHM) GoogleMaps   ; Pan American Hwy km 117, 19 km N. S. Isidro, 1800 m elevation, flight interc., 2 specimens, 20.- 25.6.1997, J. Peck ( KNHM)   ; Puntarenas, Las Alturas, Biol. Sta. (82°50.01'W, 8°56.17'N), 1660 m elevation, sampled by flight intercept trap, 4 specimens, 31.5- 3.6.2004, leg. J.S. Ashe, Z. Falin, I. Hinojosa ( KNHM) GoogleMaps   ; Puntaraneas, Reserva Biologica del Carara, nr. Rio Grande del Tarcoles (84°30'W, 9°51'N), 2 males, 14.2.1989, leg. Grimaldi & de Vries ( AMNH) GoogleMaps   ; Puntarenas, Rincon de Osa , male, 14.- 26.7.1969, leg. T. Schuh & J. Crane ( AMNH)   ; Rincon de Osa, 7 km W. Osa Penn, Est. F.N. Aguas Buenas , 50 m elevation, flight interc., 1 specimen, 25.6.1997, leg. J. Peck ( KNHM)   ; Monteverde Reserve , flight interc., 6 specimens, 26.- 28.5.1993, 30.5.1993, 1.6.1993, leg. C. Michalski ( KNHM)   ; same location, 6 specimens, 16.5., 21.5.1989, leg. J. Ashe, R. Brooks & R. Leschen ( KNHM)   ; same location, upper Laval’s wood site, Quebrada Máquina , 1400 m elevation, flight interc., 2 specimens, 21.5.1989, leg. J.S. Ashe, R. Leschen & R. Brooks ( KNHM)   ; same location, 1 specimen, 28.- 31.5.1992, leg. M. Jameson ( KNHM)   ; 11 km SW Biol Stn Las Cruzes (83°01.50'W, 8°46.43'N), wet cloud forest litter, 1450 m elevation, 2 specimens, 9.7.1999, leg. R. Anderson ( KNHM) GoogleMaps   ; Reserva Biologia Carara, nr. Rio Grande del Tarcoles , 1 specimen, 14.2.1989, leg. D.A. Grimaldi ( KNHM)   ; Heredia, Puerto Viejo, 3 km S, La Selva (84°0.0'W, 10°25.0'N), flight interc., 6 specimens, 2.- 15.6.1996, leg. R. Hanley ( KNHM) GoogleMaps   ; 3.2 km SE, La Selva , 100 m elevation, flight interc., 8 specimens, 14.2., 24.2., 28.2., 3.3., 6.3., 17.3., 19.3., 24.3.1992, leg. W. Bell ( KNHM)   ; Alajuela, San Ramon , 27 km N., 8 km W, montane forest (84°35.30'W, 10°13.30'N), 1120 m elevation, 3 specimens, 29.6.- 6.7.1999, leg. R. Anderson ( KNHM) GoogleMaps   ; Puntarenas, Rincon de Osa, Rd. Bahia Drake - Rincon , devastated forest, plantations, 0-400 m elevation (83°29'W, 8°41'N), car net, 1 male, 1 female, 9.12.2012, leg. M. Schülke & Grünberg ( MSC, UIC) GoogleMaps   ; Rd. Banigones- Chacarita , pastures, plantages, devasted forest, 0-250 m elevation (83°15'W, 8°36'N), car net, female, 11.12.2012, leg. M. Schülke & Grünberg ( UIC) GoogleMaps   ; Guanacaste, Liberia, Rd. to Hacienda Guachipelin , 135-530 m elevation (85°22'W, 10°39'N), car net, 3 females, 5.12.2012, leg. M. Schülke & Grünberg ( MSC, UIC) GoogleMaps   ; Panama: Chiriqui, 5.6 km N Boquete, La Culebra Trail (82°25.18'W, 8°49.23'N), 1400 m elevation, sampled from oak forest litter, female, male, 19.6.1996, leg. R. Anderson, #PAN2A9696-141A ( KNHM) GoogleMaps   ; Colon, Parque National Soberania Pipeline Rd. km 6.1 (79°45'W, 9°07'N), sampled by flight intercept trap, 5 specimens, 4-7.6., 7.- 21.6.1995, leg. J. Ashe, R. Brooks ( KNHM, UIC) GoogleMaps   ; same location, Pipeline Rd. km 2.0 (79°45'W, 9°07'N), flight interc., 1 specimen, 29.5.1995, leg. J. Jolly & C. Chaboo ( KNHM) GoogleMaps   ; La Fortuna, Cont. Divide Trail (82°12'W, 8°46'N), flight intercept trap, 2 specimens, 23.5.-9.6., 9.- 12.6.1995, leg. J. Ashe & R. Brooks ( KNHM) GoogleMaps   ; Darién, Cana Biol. Station (77°41.6'W, 7°45.18'N), 530 m elevation, flight intercept trap, 2 specimens, 3.- 7.6.1996, leg. J.A. Ashe & R. Brooks ( KNHM) GoogleMaps   ; Cana Biol. Stat., Serrania de Pirre (77°41.6'W, 7°45.18'N), 1250 m elevation, flight interc., 5 specimens, 4.-7.6., 7.- 9.6.1996, leg. J.S. Ashe & R. Brooks ( KNHM) GoogleMaps   ; Gualaca, 20 km N, Finca La Suiza (82°12'W, 8°39'N), 1350 m elevation, flight interc., 1 specimen, 22.- 24.5.1995, leg. J.S. Ashe ( KNHM) GoogleMaps   ; Panama, 15 km N EL Llano ( Carti Rd. ), 1 specimen, 10.05.1981, leg. R.W. Brooks ( KNHM)   ; Cuba: Cayamas (80°34'W, 22°16'N), 1 male, leg. E.A. Schwarz ( AMNH) GoogleMaps   ; Saint Lucia: Castries Marigot Harbor (61°01.29'W, 13°57.41'N), 1 female, 17.7.1980, leg. L.S. Mahunka ( NHMH) GoogleMaps   ; Ecuador: Sucumbios Prov. Sacha Lodge (76°05'W, 0°.05'S), 270 m elevation, Malaise trap, female, 24.5.- 3.6.1994, leg. Hibbs ( KNHM)   ; Sacha Lodge , 250 m, flight interc., 1 specimen, 28.10.2004, leg. G. de Rougemont ( UIC)   .

Diagnosis: The species resembles O. bicolor   and O. lewisi   in size and punctation. It can be easily differentiated from O. bicolor   by the netlike microsculpture of the pronotum. The differences to the similar O. lewisi   are mentioned there.

Description: Length: 3.5 mm. Colouration: Dark reddish to light brown; legs and antennae reddish.

Head: 0.50 mm long, 0.60 mm wide; eyes slightly prominent; anterior edge of clypeus slightly emarginate; without granules at angles; setiferous punctures large and dense; interstices between punctures one-fourth as wide as diameter of punctures or slightly shorter; moderately wide impunctate midline; netlike microsculpture fine, but distinct; surface slightly shiny.

Antennae with oblong second antennomere and conical third; third antennomere not longer than second; fourth antennomere quadrate; following two antennomeres slightly wider than long; antennomeres 7 to 10 distinctly thicker than preceding antennomeres; slightly wider than long.

Pronotum: 0.70 mm long, 0.70 mm wide; widest at anterior angles; evenly convergent to posterior angels; posterior angles obtusely rounded; lateral margin fine; invisible at anterior angles in dorsal aspect; setiferous punctures very large and deep; still larger than on head; on disc in irregular rows of 6 to 8 punctures; interstices between punctures one-fourth as wide as diameter of punctures; microsculpture netlike; surface slightly shiny.

Elytra: 0.85 mm long, 0.70 mm wide; with deep and large punctures; partly coriaceous; surface with irregular microsculpture; slightly shiny.

Abdomen with dense setiferous punctation and moderately wide impunctate midline; isodiametric microsculpture distinct; surface slightly shiny.

Protibia: 0.43 mm long, 0.15 mm wide; 9 spines on outer edge; apical 2 spines on very short digits; WLR: 2.5; in posterior aspect, comb at inner emargination partly covered in apical half; posterior face with moderately dense setation; setae nearly half as long as protibial width.

Aedeagus slender; apical lobe straight; in apical half rectangularly angulate; apex widely obtuse; inner edge of apical lobe with three pairs of sensillae.

Osoriellus minor ( NOTMAN, 1925)   new combination ( Figs 69 View Fig A-C, 97F)

Osorius minor NOTMAN, 1925: 4  

Type material examined: Trinidad: Montserrat , 1 female, 30. June 1905, leg. A. Busck (holotype in NHMW)   .

Further material examined: Mexico: Quintana (87°35'W, 19°46'N), 12 km N Reforma, male, 14.10.1986, G. Rozen ( AMNH) GoogleMaps   .

Diagnosis: Among the similarly sized species of the O.-s. str.-group, O. minor   is characterised by the absence of microsculpture on the pronotum and the dense setiferous punctation. In this respect, it resembles O. tuxtlae   , but the pronotal sides are curved in O. minor   , whereas they are forming a more trapezoidal shape in O. tuxtlae   . The aedeagus of O. minor   has a smoothly curved short apical lobe; whereas the aedeagus of O. tuxtlae   is rectangularly angulate.

Description: Length: 4.8 mm. Colouration: Black; legs and antennae brown; posterior edge of pronotum dark reddish.

Head: 0.61 mm long, 0.94 mm wide; eyes slightly prominent; approximately twice as long as temples; angles of clypeus produced to short granules; setiferous punctation moderately dense and deep; posteriorly and laterally much denser than on clypeus; on clypeus, interstices between punctures at least twice as wide as diameter of punctures; on posterior vertex interstices between punctures shorter than diameter of punctures; supraocular punctures more distinctly granulate than punctures on vertex; few supraocular short striae; isodiametric microsculpture dense and distinct; surface slightly shiny.

Antennae with oval second and conical third antennomere equally long; following three antennomeres quadrate or slightly wider than long; last five antennomeres distinctly thicker than preceding antennomeres, but more or less quadrate.

Pronotum: 0.93 mm long, 1.00 mm wide; widest near anterior angles; evenly convergent to obtuse posterior angles; lateral margin fine; large setiferous punctures in irregular rows; on average, interstices between punctures half as wide as diameter of punctures; narrow midline impunctate; surface with weak netlike microsculpture; microsculpture less deep than on head and surface more shiny.

Elytra: 1.04 mm long, 1.04 mm wide; large setiferous punctures hardly visible between deep coriaceous ground-sculpture; punctures in irregular rows.

Abdomen with dense and deep setiferous punctation; isodiametric microsculpture distinct and similar as on head; microsculpture more distinct than on pronotum.

Protibia: 0.50 mm long, 0.17 mm wide; 8 spines on outer edge; apical spines inserted on short digits; WLR: 2.10; in posterior aspect, comb of inner emargination totally visible; posterior face with dense setation.

Aedeagus slender; apical lobe straight; slightly curved in nearly rectangular angle to acute apex; inner edge of apical lobe with row of several sensillae.


American Museum of Natural History


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


Naturhistorisches Museum, Wien














Osoriellus micros ( SHARP, 1887 )

Irmler, Ulrich 2014

Osorius minor

NOTMAN, H. 1925: 4

Osorius micros

SHARP, D. 1887: 682