Osoriellus debilis ( 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: 264-267

publication ID

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

persistent identifier

http://treatment.plazi.org/id/E01A87D0-FFEC-FFE0-4E68-FC7DFC3FFB26

treatment provided by

Felipe

scientific name

Osoriellus debilis ( SHARP, 1887 )
status

new combination

Osoriellus debilis ( SHARP, 1887)   new combination

( Figs 73 View Fig A-C, 100D)

Osorius debilis SHARP, 1887: 681  

Type material examined: Panama: Chiriqui, Volcan de   Chiriqui, leg. Champion (syntype in BMNH)   .

Further material examined: Mexico: Chiapas, Union Juarez, NE slope Volcan Tacana, Rio de Finca Muxbal , from freshly cut stump, much sap, peeling bark, 1430 m elevation, 26.12.1975, leg. H. Frania ( AMNH)   ; Ruinas de Palenque , nr. Group IV, stump litter, 1 male, 1 female, 6.4.1971, leg. C. Alteri ( AMNH)   ; Palenque, Ruines , 3 specimens, 6.04.1974, C.H. Curran ( AMNH)   ; San Louis de Potosi, Sierra de la Abra, Sotano de la Tinaja , flood debris on mud, slope, 500 m from entrance, 2 males, 1 female, 18.2.1970, leg. J.A.L. Cook ( AMNH)   ; same location, but 500 m in cave, 16.3.1972, leg. J.A. Cook ( AMNH)   ; Veracruz, 34 km N of Maolinco , 1280 m elevation, 21.- 22.4.1978, leg. Henry, Schaffner & Schuh ( AMNH)   ; Nayarit, Tepic , 1 specimen, 7.08.1947, B. Malkin ( AMNH)   ; Chajul, Selva Lacandona, Rio Lacatun , swebt & beaten, 1 specimen, 26.06.1996, leg. L.S. Mahunka ( NMB)   ; Oaxaca, Oaxaca City , stream bank in tropical forest (partly sifting), 9 specimens, 12.11. + 16.11.1989, leg. R. Baranowski ( SMNH)   ; Belize: Orange Walk Dist. Rio Bravo Conservation Area, La Milpa Field Station , flight interc., 1 specimen, 25.5.1997, leg. C.E. Carlton ( KNHM)   ; Guatemala: 1 male, leg. Conradt, without more data ( SDEI)   ; Honduras: Cortés, Parque Nacional Cusuco , 5 km N Buenos Aires (88°13'W, 15°29'N), oak/pine cloud forest, Malaise trap, 1 female, 15.08.1995, leg. R. Cave ( SMNH) GoogleMaps   ; El Paraiso, 6.9 km W Yuscarán, Cerro Montserrat (86°24'W, 13°55'N), forest litter, 1760 m elevation, Berlese , 1 specimen, 27.7.1994, leg. R. Anderson ( KNHM) GoogleMaps   ; Nicaragua: Matagalpa, 6 km NW, Selva Negra, Fountain Youth Trail (85°54.53'W, 12°59.99N), 1450 m elevation, flight interc., 1 specimen, 22.5.2002, leg. R.W. Brooks, Z. Falin, S. Chatzimanolis ( KNHM) GoogleMaps   ; Costa Rica: Puntarenas, 35 km NE San Vito, nr. Las Alturas, trail to Echandi , 2000 m elevation, beyond trail marker, litter near stream, 13 males, 23 females, 19.3.1991, leg. L. Herman ( AMNH)   ; same location, but under bark of logs, female, 20.3.1991, leg. L. Herman ( AMNH)   ; 35 km NE San Vito, nr. Las Alturas, trail to Cerro Enchandi , 2200 m elevation, beyond trail marker 30, litter near stream, 2 females, 19.3.1991, leg. L. Herman ( AMNH)   ; Las Cruzes, Biol. Stat. (82°57.58'W, 8°47.14'N), 1330 m elevation, flight interc., 3 specimens, 28.5.- 30.5.2004, 28.5.- 31.5.2004, leg. J.S. Ashe, Z. Falin & I. Hinojosa ( KNHM) GoogleMaps   ; Altamira Biol. Stn . (83°00.49'W, 8°56.17'N), 1510-1600 m elevation, flight interc., 4 specimens, 4.- 7.6.2004, leg. J.S. Ashe, Z. Falin & I. Hinojosa ( KNHM) GoogleMaps   ; Las Alturas Biol Stn . (82°50.01'W, 8°56.17'N), 1660 m elevation, flight interc., 3 specimen, 3.6.2004, leg. J.S. Ashe, Z. Falin & I. Hinojosa ( KNHM) GoogleMaps   ; Rincon de Osa (83°31.11'W, 8°41.14'N), 50 m elevation, flight interc., 1 specimen, 26.6.2001, leg. S. & J. Peck ( KNHM) GoogleMaps   ; Corcovado National Park, Sirena Stn. lower Ollas Trail (83°35.22'W, 8°24.48'N), 5 m elevation, flight interc., 2 specimens, 24.- 28.06.2000, leg. Z.H. Falin ( KNHM) GoogleMaps   ; same location, but Rio Pavo Trail , flight interc., 3 specimens, 25.- 28.6.2000, leg. Z.H. Falin ( KNHM) GoogleMaps   ; Monteverde, Boehme House , pitfall trap, 1400 m elevation, 1 specimen, 24.5.1989, leg. J.S. Ashe, R. Leschen, R. Brooks ( KNHM)   ; same location, flight interc., 1 specimen, 31.5.1992, leg. M.E. Jameson ( KNHM)   ; Finca La Pacifica (85°08'W, 10°27'N), dry forest leaf litter, 40 m elevation, 17.07.1988, leg. L. Longino ( KNHM) GoogleMaps   ; Heredia, Puerto Viejo de Serapiqui, La Selva Biol. Station , female, 18.2.1985, leg. L. Herman ( AMNH)   ; Puerto Viejo, 3 km S, La Selva (84°00'W, 10°25'N), 80 m elevation, flight interc., 1 specimen, 2.- 15.6.1996, leg. S. Haase-Statz & R. Hanley ( KNHM) GoogleMaps   ; Finca Zurqui (84°00.22'W, 10°02.57'N), 1490 m elevation, flight interc., 15.- 23.11.2001, R.W. Brooks ( KNHM) GoogleMaps   ; San José, female, leg. E. Schmidt ( AMNH)   ; 2.4 km ENE Sn Gerardo de Riva (83°34.20'W, 9°28.47'N), 1700 m elevation, flight interc., 1 specimen, 11.6.2004, leg. J.S. Ashe, Z. Falin & I. Hinojosa ( KNHM) GoogleMaps   ; Cartago, Ref. Nac. de Faune Silvestre , 2.5 km E Stn. (83°46.82'W, 9°44.23'N), 1330 m elevation, flight interc., 1 specimen, 1.11.2001, leg. R.W. Brooks ( KNHM) GoogleMaps   ; Panama: Colon, Parque Nacional Soberania, Pipeline Rd. km 6.1, flight intercept trap, 7 specimens, 7.6.1995, 7.- 21.6.1995, leg. J.S. Ashe, R. Brooks ( KMNH, UIC)   ; same location, but Pipeline Rd. km 2.0, km 5.3, km 4.1, 4 specimens, 23.5., 15.5., 16.5., 18.-19.5., 27.5.1995, leg. J. Jolly, C. Chaboo ( KNHM)   ; Poterillo , female, 27.5.1934, Blackwelder coll ( AMNH)   ; Chiriqui, NW Volcan (82°40.26'W, 8°49.16'N), litter near stream, 1410 m elevation, 2 males, 2 females, 16.5., 17.5.2001, leg. L. Herman & W. Opitz, ( AMNH) GoogleMaps   ; Barro Colorado, by Berlese sample, 1 specimen, 1.11.1952, leg. J. Zatek ( AMNH)   ; Barro Colorado , 5 specimens, 1.12.1929, 19.12.1928, 23.12. + 25.12.1928, leg. C.H. Curran ( AMNH)   ; Barro Colorado , 1 specimen, 16.11.1930, F.G. Lutz ( AMNH)   ; Panama, Rd. to Cerra Campana , litter nr. stream, 1 specimen, 22.12.2001, leg. L. Herman ( AMNH)   ; Canal Zone, Ciricito , male, 13.3.1930, coll. R. Blackwelder ( AMNH)   ; Barro Colorado Isd. (79°51'W, 9°11'N), flight interc., 9 specimens, 7.7., 1.8., 6.8., 11.8., 16.8., 1994, leg. D. Banks ( KNHM) GoogleMaps   ; same location, 1 specimen, 27.7.2000, leg. S. Chatzimanolis ( KNHM) GoogleMaps   ; La Fortuna, Continental Divide Trail (82°12.0'W, 8°46.0'N), forest litter, Berlese, 1200 m elevation, 1 specimen, 9.6.1995, leg. R. Anderson ( KNHM) GoogleMaps   ; Venezuela: Aragua, Ocumare , 2.5 km NE (63°41.0'W, 10°03.0'N), flight intercept trap, 1 specimen, 4.- 18.7.1994, leg. T. Phillips ( KNHM) GoogleMaps   ; Columbia : without further data, labelled as O. fulvipes (ZMHB)   ; S. Am. Colombia, without further location, 3 females, 1937, leg. G. Dahl ( SMNH)   ; Ecuador: Pichincha, Maquipucuna Station , 45 km NW Quito, 1600-1650 m elevation, flight intercept trap, male, 13.-14.Apr.1990, leg. C. Carlton & R. Adrave ( KNHM)   .

Diagnosis: Concerning the shape of the pronotum, the species can be confused with O. schwarzi   , O. rougemonti   and related species. However, O. debilis   is distinctly smaller. A few specimens of O. debilis   were not longer than 4.9 mm. It resembles O. trapezoides   in size, but the shape of the pronotum in O. trapezoides   is more convergent; whereas in O. debilis   the pronotal sides are smoothly curved and nearly subparallel in the anterior half. Large specimens of the species are also similar to small specimens of O. schwarzi   . In O. schwarzi   the microsculpture of the pronotum is isodiametric, whereas in O. debilis   it is more longitudinal. In addition, the apical lobe of the aedeagus of O. debilis   is more slender and with a rectangular angle in the upper half. In O. schwarzi   the apical lobe is longer and thicker.

Description: Length: 4.9 – 5.4 mm. Colouration: Dark brown; elytra slightly lighter; legs and antennae reddish.

Head: 0.75 mm long, 1.0 mm wide; eyes slightly prominent; front edge of clypeus even with short granules at each angle; with large, but weak setiferous punctures; clypeus and vertex more densely punctate; at base of antennae impunctate; very weak isodiametric microsculpture; surface nearly polished.

Antennae with oblong second antennomere; as long as conical third antennomere; fourth to sixth antennomeres nearly quadrate; approximately half as long as third; slightly increasing in width; antennomeres 7 to 10 distinctly wider than preceding antennomeres, but more or less quadrate.

Pronotum: 0.95 mm long, 1.05 mm wide; widest at anterior angles; slightly narrowed in anterior two-third; distinctly convergent in posterior third; lateral margin fine; in dorsal aspect close to anterior angles invisible; setiferous punctures large and deeper than on head; punctures partly in irregular rows and coriaceous; on average, interstices between punctures half as wide as diameter of punctures, but laterally and posteriorly with sparser punctation; wide impunctate midline; with weak netlike microsculpture; microsculpture more distinct than on head; surface less shiny than on pronotum.

Elytra: 1.25 mm long, 1.15 mm wide; with irregular deep setiferous punctation; punctures slightly visible in deep coriaceous ground-sculpture.

Abdomen with dense but fine setiferous punctation; netlike microsculpture fine; surface moderately shiny.

Protibia: 0.72 mm long, 0.27 mm wide; with 9 spines at outer edge; spines not inserting on digits; WLR: 6.0; comb of inner emargination visible throughout its total length; posterior face densely covered by long yellow setae.

Aedeagus with apical lobe slender and at base in one line with basal lobe; curved in nearly rectangular angle in apical half; ending in obtuse apex; inner edge of apical lobe with few sensillae.

Osoriellus eggersi ( BERNHAUER, 1904)   new combination ( Figs 62 View Fig A-C, 97C)

Osorius eggersi BERNHAUER, 1904: 19  

Osorius laeviceps NOTMAN, 1925: 15   new synonymy

Type material examined: Saint Thomas: West Indies , (64°.45'W, 18°20'N) leg. Eggers (holotype of O. eggersi   in FMNH)   ; Puerto Rico: San Juan (66°06'W, 18°24'N) female, 1.- 5.7.1915, leg. Lutz and Mutchler (holotype of O. laeviceps   in AMNH, # F 4003 View Materials d) GoogleMaps   .

Further material examined: Cuba: Prov. Pinar del Rio, Sierra del Rosario, El Mulo (83°20'W, 22°42'N), north. slope, T. caida, MNA, 400 m elevation, 1 female, 2 males, 1 female, 11.- 15.10.2007, leg. A. Lozada & A. Hdez ( IES) GoogleMaps   ; El Mulo , southern. slope, under bark, MSB, 200 m elevation, 1 female, 16.10.2007, leg. A. Lozada ( IES)   ; El Solón (83°20'W, 22°42'N), SSB, bajo corteza, southern slope, 200 m elevation, 1 female, 242.1.2008, leg. A. Lozada ( IES) GoogleMaps   ; Artemisia, Cayajabos (82°51'W, 22°51'N), Sierra del Rosario , 2 females, 14.2.1932, leg. A. Bierig ( BMNH) GoogleMaps   ; Dominican Republic: Constanza, 7 miles W. Bonao, road to Constance (70°44'W, 18°53N), 5.8.1991, leg. L. Herman, collected in leaf litter near stream ( AMNH) GoogleMaps   ; Jarabacoa, 6.5 mi W, east slope below Hotel Montana , 27.06.1991, leg. L. Herman, collected litter near stream ( AMNH)   ; San Francisco de Macoris, Loma de Quita Espuela (- 70°14'W, 19°18'), 24.07.1991, leg. L. Herman, collected litter near stream ( AMNH)   ; Haiti: Kenskoff (72°17.13'W, 18°27.2 N), Massif de la Selle, 1 specimen, 12.11.1934, leg. Darlington ( MCZ) GoogleMaps   ; Jamaica: Montego Bay (77°55', 18°27'N), sifted, 1 specimen, 10.03.1911, leg. Grossbeck ( AMNH)   ; Mexico: San Luis Potosi , 12 km NW Naranjo, 400 m elevation, flight intercept trap, 5.7.1990, leg. J.S. Ashe, K.J. Ahn, R. Leschen ( KNHM)   ; Jamaica , leg. Cameron, without further data ( BMNH)   ; Nicaragua: Matagalpa, 6 km NW, Selva Negra, Fountain of Youth trail 1400 m elevation, flight intercept trap, 1 male, 22.5.2002, R.W. Brooks, Z. Falin, S. Chatzimanolis ( KNHM)   .

Diagnosis: O. eggersi   mostly resembles O. humicola   in size and punctation of the pronotum. Without dissection of the aedeagus both species cannot be separated. In O. eggersi   , the outer edge of the apical lobe of the aedeagus is sinuate ending in an acute apex, whereas in O. humicola   it is evenly curved ending in an obtuse apex. O. eggersi   also resembles O. carinicollis   from the remaining-speciesgroup, but O. carinicollis   has a distinctly digitate protibia, it is slightly smaller and the punctation of the pronotum is slightly finer. O. eggersi   seems to be variable concerning the punctation of the pronotum and the number of sensillae on the apical lobe of the aedeagus. The specimens from Jamaica show a denser pronotal punctation than the specimens from Cuba, St. Thomas, and the Dominican Republic and only two instead of three apical sensillae.

Description: Length: 3.7 – 3.8 mm. Colouration: Brown; elytra slightly lighter; abdomen light brown; legs and antennae yellow.

Head: 0.55 mm long, 0.70 mm wide; fore-head slightly elongate; distance from eyes to front margin 1.5 times as long as temples; densely and distinctly punctate; interstices between setiferous punctures half as wide as diameter of punctures; small area on central clypeus and another area at base of antennae impunctate; seta pointing posteriorly; surface without microsculpture; polished and shiny.

Antennae with first antennomere as long as three following antennomeres; second antennomere oval and as long as conical third; antennomeres 4 to 6 small, approximately quadrate; antennomeres 7 to 10 distinctly thicker and wider than long.

Pronotum: 0.70 mm long, 0.75 mm wide; widest at anterior angles; evenly convergent to posterior angles; slight emargination in front of posterior angles; lateral margin fine; coarsely and densely punctate; interstices between setiferous punctures as on head, but punctures deeper; moderately wide midline impunctate; setae pointing posteriorly; between coarse punctation with sparse micro-punctation; surface without microsculpture, polished and shiny.

Elytra: 0.75 mm long, 0.75 mm wide; with coriaceous ground-sculpture and deep and dense setiferous punctation, punctures slightly visible in coarse groundsculpture; yellow setae pointing posteriorly; surface less shiny than on pronotum.

Abdomen with even denser setiferous punctation than on pronotum, but punctures finer; surface with weak netlike microsculpture; less shiny than on pronotum.

Protibia 0.44 mm long, 0.14 mm wide; with 9 long spines at outer edge; apical spines on short digits; WLR: 2.5; in posterior aspect, comb of inner emargination visible throughout its total length; posterior face densely covered by long yellow setae.

Aedeagus rectangularly angulate; upper edge of apical lobe sinuate ending in acute apex; inner edge of apical lobe with two groups of sensillae.

Osoriellus exiguus ( NOTMAN, 1925)   new combination ( Figs 43 View Fig A-C, 94A)

Osorius exiguus NOTMAN, 1925: 16  

Type material examined: Cuba: Cayamas (80°34'W, 22°16'N), male, leg. E. Schwarz (holotype in NHMW) GoogleMaps   .

Further material examined: Cuba: Prov. Granma, PN Turquino, on trail up to ca. 0.5 km S (by air) from La Platica (76°53.3'W, 20°0.5'N), 920 m elevation, sifting of leaf litter and decaying wood in the secondary forest with many tree ferns and rich understory vegetation with meny ferns, 3 males, 7 females, 23.- 27.06.2012, leg. Deler- Hernández & Fikáček, #MF20 ( NMP, UIC) GoogleMaps   ; same region, saddle below La Mariposa, ca. 0.8 km SE La Platica (by air) (76°52.9'W, 20°0.5N), 1050 m elevation, sifting of leaf litter and decaying wood in the low secondary evergreen forest with rather rich understory vegetation and many roots, 4 males, 4 females, 24.06.2012, leg. Deler-Hernández & Fikáček, # MF22 ( NMP) GoogleMaps   ; same region, slope below Pico Naranjo ca. 0.4 km N La Platica (by air) (76°53.3'W, 20°0.9'N), 950 m elevation, sifting of rather dry leaf litter and decaying wood in the secondary bushes with thin litter layer and rather rich understory (moss, grasses), 1 female, 24.06.2012, leg. Deler-Hernández & Fikáček, # MF23 ( NMP) GoogleMaps   ; Belize: Cayo, Las Cuevas Research Station (88°58.24'W, 16°44.00'N), 550 elevation, flight intercept trap, 3 males, 3 females, 22.- 26.5.2000, 18.- 21.5.2000, 27.- 31.5.2000, female, sifted under rotten log, 22.5.2000, leg. M. Caterino ( BMNH) GoogleMaps   ; Costa Rica: Puerto Viejo, 3 km S, La Selva Biol. Stn ., female, 16.04.1988, leg. Hespenheide ( KNHM)   .

Diagnosis: O. exiguus   is one of the smallest species of the genus and darker in colour than the other small species, i.e. O. coruscus   . In O. exiguus   the head is dark brown in cotrast to the light brown remaining body, whereas O. coruscus   is totally yellow to light brown. In contrast to O. coruscus   , the apical margin of the clypeus is even and angles without granules. The species also resembles O. indescriptus   and without dissecting of the aedeagus the two species cannot be certainly identified. The punctation of the pronotum in O. indescriptus   is slightly deeper and denser than in O. exiguus   and colouration is darker. The aedeagus of O. indescriptus   has a thick, nearly triangular apical lobe, whereas the apical lobe of O. exiguus   is slender.

Description: Length: 2.5 mm. Colouration: Light red; head brown; elytra, legs and antennae yellow; posterior margin of elytra dark.

Head: 0.42 mm long, 0.56 mm wide; eyes small; temples as long as eyes; apical edge of clypeus even; setiferous punctation on disc distinct and dense; wide midline and area at base of antennae impunctate; punctation of clypeus less dense; on clypeus, interstices between punctures at least as wide as diameter of punctures; setae pointing to middle; on vertex, interstices between punctures half as wide as diameter of punctures; surface without microsculpture, shiny.

Antennae short and stout; slightly longer than head; second antennomere thick and oval, nearly as thick as first antennomere; third and fourth antennomeres distinctly smaller than second; fourth and fifth antennomeres quadrate; following two antennomeres two times wider than long; last four antennomeres distinctly thicker than preceding antennomeres, but only slightly wider than long.

Pronotum: 0.52 mm long, 0.57 mm wide; widest at anterior angles; evenly narrowed to posterior edge; posterior edge smoothly rounded; setiferous punctation large and dense; interstices between punctures less than half as wide as diameter of punctures; wide impunctate midline; setae of punctures pointing to middle; surface without microsculpture, polished.

Elytra: 0.61 mm long, 0.56 mm wide; with coriaceous ground-sculpture; punctures slightly visible between coarse ground-sculpture.

Abdomen densely and coarsely punctate; setae of punctures pointing posteriorly; without microsculpture, surface shiny.

Protibia: 0.32 mm long, 0.09 mm wide; with 8 spines at outer edge; apically without digits; WLR: 3.0; in posterior aspect, comb at inner emargination partly covered in middle; posterior face with long yellow setae.

Aedeagus smoothly curved; apical lobe slender; apex of apical lobe obtuse; without sensillae at inner edge of apical lobe.

AMNH

American Museum of Natural History

NMB

Naturhistorishes Museum

SMNH

Department of Paleozoology, Swedish Museum of Natural History

KNHM

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

KMNH

Kitakyushu Museum and Institute of Natural History

FMNH

Field Museum of Natural History

MCZ

Museum of Comparative Zoology

NHMW

Naturhistorisches Museum, Wien

NMP

National Museum (Prague)

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Osoriellus

Loc

Osoriellus debilis ( SHARP, 1887 )

Irmler, Ulrich 2014
2014
Loc

Osorius laeviceps

NOTMAN, H. 1925: 15
1925
Loc

Osorius exiguus

NOTMAN, H. 1925: 16
1925
Loc

Osorius eggersi

BERNHAUER, M. 1904: 19
1904
Loc

Osorius debilis

SHARP, D. 1887: 681
1887