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

Osoriellus micros ( SHARP, 1887) new combination

( Figs 54 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) ; 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) ; 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) ; El Salvador: La Libertad (89°19'W, 13°29'N); 1 female, 24.1.1930, leg. R.E. Blackwelder ( AMNH) ; 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) ; 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) ; 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) ; 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) ; 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) ; 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) ; 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) ; 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) ; 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) ; Rd. BanigonesChacarita , 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) ; 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) ; 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) ; 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) ; 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) ; 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) ; 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) ; 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) ; 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) ; 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) ; Saint Lucia: Castries Marigot Harbor (61°01.29'W, 13°57.41'N), 1 female, 17.7.1980, leg. L.S. Mahunka ( NHMH) ; 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.

Figures

Fig. 53-57: Osoriellus-s. str.-group: Osoriellus brevicornis (53), O. micros (54), O. surinamensis (55), O. grossopunctatus (55); Osoriellus ashei (57); antenna (A), protibia (B), aedeagus in lateral aspect (C); scale bar: 0.1 mm.