Osoriellus adustus, 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: 296-299

publication ID

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

persistent identifier

http://treatment.plazi.org/id/E01A87D0-FF8C-FF80-4E68-FC1DFEA0FAC6

treatment provided by

Felipe

scientific name

Osoriellus adustus
status

n. sp.

Osoriellus adustus   n. sp.

( Figs 108 View Fig A-C, 123E)

Type material: Holotype, male: Peru: Loreto Prov., Iquitos (73°14'W, 3°44'S), 90 m elevation, collected in leaf litter in the forest, 8.5.1992, leg. J. Danoff-Berg ( KNHM). GoogleMaps  

Paratype: Peru: 1 female with same data as holotype ( UIC) GoogleMaps   .

Diagnosis: The species is characterised by the deep and dense microsculpture of the pronotum and the digitate protibibia with a WLR of 1.00. Species with a similarly deep pronotal microsculpture are larger such as O. opacus   and O. opacinotus   or have additionally no digitate protibia.

Description: Length: 4.5 long. Colouration: Dark brown, nearly black; legs and antennae reddish brown.

Head: 0.55 mm long, 0.94 mm wide; eyes prominent; nearly twice as long as temples; sides of fore-head convergent to anterior angles of clypeus in smooth concave curve; anterior edge of clypeus even; punctation with moderately deep and irregularly dense punctation; punctures without setae except one pair of setae on clypeus, one pair on vertex close to neck, and several setae on supraocular area; large area at base of antennae impunctate; punctation on vertex much denser than on clypeus; on vertex, interstices between punctures aproximately as wide as diameter of punctures; on supraocular area, punctation partly coriaceous and with striae; isodiametric microsculpture dense and deep; surface matt.

Antennae slightly shorter than head and half of pronotum combined; second antennomere elongate; approximately 1.5 times as wide as conical third antennomere; fourth and fifth antennomere as wide as third; sixth anten- nomere quadrate and slightly wider than preceding antennomeres; following antennomeres distinctly wider than preceding antennomeres; quadrate.

Pronotum: 0.94 mm long, 1.05 mm wide; widest at anterior angles; anterior angles slightly produced; sides convergent to posterior angles in smooth even curve; posterior angles distinct, but obtuse; lateral margin fine in anterior half, slightly thicker in posterior half; shortly in front of posterior angles, slightly widened; in dorsal aspect, covered close to anterior angles; punctation sparser and deeper than on head; with short setae; on average, interstices between punctures at least twice as wide as diameter of punctures; punctures denser within irregular row adjacent to moderately wide impunctate midline; isodiametric microsculpture deep and dense; surface matt.

Elytra: 1.13 mm long, 1.08 mm wide; shoulders rounded; sides sligthly widened posteriad; widest in posterior third; punctation similarly dense and deep as on pronotum; in irregular rows; coriaceous ground-sculpture weak; isodiametric microsculpture dense, but weaker than on pronotum; surface slightly shinier than on pronotum.

Abdomen with sparse and fine punctation; punctures without setae except few setae in transverse row; netlike microsculpture weaker than on fore-body; surface shiny. Protibia: 0.57 mm long, 0.15 mm wide; slender; outer edge with seven spines; apical spines inserting on moderately long digits; WLR: 1.0; in posterior aspect, inner emargination with comb visible throughout its total length; posterior face sparsely covered by long yellow setae.

Aedeagus thick; apical lobe smoothly curved; apex widely rounded; inner edge of apical lobe with nine sensillae.

Etymology: The specific name adustus   derived from the same Latin word meaning brownish and refers to the dark brown colouration.

Osoriellus carinicollis ( NOTMAN, 1925)   new combination ( Figs 104 View Fig A-C, 123A)

Osorius carinicollis NOTMAN, 1925: 7  

Typ material examined: Guatemala: Alta Vera Paz , Cacao, Trece Aguas, (89°.45'W, 15°24'N), 25.3., female, leg. Barber & Schwarz (holotype in NMNH)   .

Further material examined: Mexico: Chiapas, Ruines de Palenque (91°58'W, 17°29'N), nr. Group IV, from stump litter, 7 specimens, 6.4.1974, leg. C. Altieri ( AMNH, UIC) GoogleMaps   ; Ruines, litter, Berlese sample, 2 specimens, 25.7.1973, leg. J. Reddell ( AMNH)   ; Ruines , 2 specimens, 3.4.1974, leg. C. Alteri ( AMNH)   ; Veracruz, Cordoba (96°55'W, 18°53'N), 5 specimens, 4.8.1969, leg. J. Peck ( AMNH) GoogleMaps   ; Paraje Nueve Nacimiento, tropical evergreen forest, Berlese sample, 3 specimens, 7.8.1969, leg. J. Peck ( AMNH)   ; Fortin de las Flores (97°00'W, 18°54'N), 5.8.1969, leg. J. Peck ( AMNH) GoogleMaps   ; Tamaulipas, Rancho del Cielo, Gomes Farias (98°55.50'W, 21°09.56'N), 3 specimens, 4.07.1969, leg. J. Peck ( AMNH) GoogleMaps   ; Queretaro, 18 mi. E Landa de Matamoros (100°23'W, 20°35'N), pine oak leaf litter, 1760 m elevation, 2 specimens, 14.7.1969, leg. J. Peck ( AMNH) GoogleMaps   ; Chiapas, Ocosingo, Nahá Selva Lacandona , mixed montane forest litter, 2 specimens, 13.7.2003, leg. R. Anderson ( KNHM)   ; Oaxaca, Tlaxiaco (97°40'W, 17°16'S), 7 km S, 2000 m elevation, 1 specimen, 10.10.1990, leg. R. Baranowski ( SMNH) GoogleMaps   ; Valle Nacional (96°18'W, 17°46'N), 21 km S, 1200 m elevation, 7 specimens, 10.09.1986, leg. R. Baranowski ( SMNH, UIC) GoogleMaps   ; 24-25 km S, 1300 m elevation, 2 specimens, 14.09.1986, leg. R. Baranowski ( SMNH)   ; 23 km SW Valle National, km 76, cloud forest leaf litter, Berlese , 1 specimen, 28.07.1992, leg. R. Anderson ( KNHM)   ; Jalapa, 2.3 km S on Coatepec road, forest litter, 1 specimen, 13.7.1992, J.S. Ashe & H. Frania ( KNHM)   ; samelocation,but 1.1 km S on Coatepec road, leaf litter in rivine, 1280 m elevation, 1 specimen, 12.7.1992, leg. J.S. Ashe ( KNHM)   ; same location, but 2.3 km S on Coatepec road, stream side litter, 1380 m elevation, 1 specimen, 13.7.1992, leg. J.S. Ashe ( KNHM)   ; Chichen Itza , 11.9.1952, leg. J. & D. Pallister, C.R. Vose Fund, Explorers club ( AMNH)   ; Belize: Orange Walk, Rio Bravo Conservation area , 1 female, 18.4.1996, leg. C.E. Carlton ( UIC)   ; Orange Walk, 9 specimens, 25. + 26.4.1996, leg. C. Carlon & V. Moseley, collected by flight intercept trap ( KNHM, UIC)   ; 2 specimens, 26.4.1996 and 18.4.1996, leg. C. Carlon & V. Moseley, collected by berlese extraction ( KNHM)   ; Alta Verapaz 6 km W Tactic, sifting litter under bushes of road side, tropical montane foest, 1430 m elevation, 3 males, 22.11.1991, leg. R. Baranowski ( SMNH)   ; Costa Rica: Puntarenas, Rincon de Osa , female, 14.- 26.7.1969, leg. T. Schuh & J. Crane   ; Heredia, 3.2 km SE, La Selva, 100 m elevation, flight interc., 2 specimens, 11.3, 24.3.1992, leg. W. Bell ( KNHM)   ; Guanacaste, Cacao Biol. Stn. (85°27.0'W, 10°56.0'N), leaf litter, Berlese , 1 specimen, 4.5.1995, leg. R. Anderson ( KNHM) GoogleMaps   ; Panama: Colon (79°45'W, 9°07'N), Parque Nac. Soberania, Pipeline Rd. km 6.1, flight intercept trap, 7.6.1995, leg. J.S. Ashe ( KNHM) GoogleMaps   ; Parque Nac. Soberania, Pipeline Rd. , flight intercept trap, 5 specimens, 18.5.1995, 20.05.1995, 23.05.1995, leg. J. Jolly ( KNHM)   ; 6.1 km on Pipline Rd. nr. Gamboa , flight intercept trap, 1 specimen, 29.5.1995, leg. J.S. Ashe ( KNHM)   ; Parque Nac. Soberania, Pipeline Rd. km 2.0, 1 specimen, 16.5.1995, leg. J.S. Ashe ( KNHM)   ; same location, flight intercept trap, 1 specimen, 23.5.1995, leg. J. Jolly & C. Chaboo ( KNHM)   ; same location, but km 5.3 (79°45'W, 9°07'N), 40 m elevation, 29.- 31.5.1995, leg. J.S. Ashe ( KNHM) GoogleMaps   ; Chiriqui, La Fortuna, Hydro Trail (82°14'W, 8°42'N), 1150 m elevation, flight interc., 3 specimens, 31.5.-2.6., 23.5.- 9.6.1995, leg. J.S. Ashe & R. Brooks ( KNHM) GoogleMaps   ; Panama, Barro Colorado Isd. (79°51'W, 9°11'N), flight interc., 1 specimen, 24.8.1994, leg. D. Banks ( KNHM) GoogleMaps   ; Ecuador: Pichincha, Tinalandia, Santo Domingo , 16 km E (79°03.39'W, 0°16.53'S), 750 m elevation, flight interc., 2 specimens, 27.3.1999, leg. R.W. Brooks & D. Brzoska ( KNHM) GoogleMaps   ; Maquipucuna , 50 km NW Quito, 1720 m elevation, flight interc., 1 specimen, 23.12.1991, leg. C.E. Carlton & R. Leschen ( KNHM)   ; Mindo , 10.6 km W Mindo Road (78°45.14'W, 0°04.23'S), 1375 m elevation, flight interc., 3 specimens, 29.3.1999, leg. R.W. Brooks & D. Brzoska ( KNHM) GoogleMaps   ; 45 km NW Quito, Macquipucuna Station , 1600-1650 m elevation, flight interc., 1 specimen, 18.4.- 5.5.1996, leg. P. Hibbs ( KNHM)   ; Esmeraldas, Bilsa , flight intercept trap, 1 specimen, 10.5.1996, leg. P. Hibbs ( KNHM)   ; Peru: Madre de Dios, Manu National Park, Cocha Salvador, Reserved Zone (71°31.36'W, 12°00.13'S), 310 m elevation, flight interc., 1 specimen, 20.- 21.10.2000, leg. R.W. Brooks ( KNHM) GoogleMaps   ; Loreto, ort: Teniente Lopez , 1.5 km N (76°06.92'W, 2°35.66'S), fruit fall, 210-240 m elevation, 1 specimen, 17.7.1993, leg. R. Leschen ( KNHM) GoogleMaps   .

Diagnosis: The dense and deep punctation of the pronotum and the elytra of O. carninicollis   is similar as in O. eggersi   , but O. carinicollis   is smaller and has a digitate protibia. The sides of the pronotum are slightly more evenly convergent to the posterior angles. The elytra of O. carinicollis   are slightly longer than wide, but quadrate in O. eggersi   . The apical lobe of the aedeagus is smoothly curved to an acute apex, whereas in O. eggersi   the apical lobe is thicker and dorsally slightly emarginate. The species seems to be variable in size and shape of the aedeagus. In some specimens the apical lobe is slightly more curved than in others.

Description: Length: 3.0 – 3.5 mm. Colouration: Brown; elytra slightly lighter; legs and antennae yellow.

Head: 0.30 mm long, 0.65 mm wide; eyes slightly prominent; slightly longer than temples; anterior edge of clypeus even; without granules at angles; setiferous punctation dense and deep; interstices between punctures less than one-fourth as wide as diameter of punctures; small areas on vertex and at base of antennae impunctate; surface without microsculpture; shiny.

Antennae with second antennomere oblong, slightly longer than wide; third and fourth antenomeres distinctly shorter and smaller than second; fourth and fifth antennomeres slightly wider than two preceding antennomeres; quadrate; antennomeres 6 to 11 distinctly wider than long.

Pronotum: 0.60 mm long, 0.70 mm wide; widest at anterior edge; slightly convergent to posterior edge; posterior angles obtuse; lateral and posterior margin narrow; in dorsal aspect, lateral margin hardly visible at anterior angles; setiferous punctation as dense and deep as on head; moderately wide midline impunctate; setae pointing posteriad; surface without microsculpture; shiny.

Elytra: 0.80 mm long, 0.70 mm wide; with similar dense and deep setiferous punctation as on pronotum; setae pointing posteriad; in contrast to surface of pronotum, surface with weak coriaceous ground-sculpture and matt.

Abdomen with dense and deep setiferous punctation; setae pointing posteriad; posterior abdominal segments with indistinct impunctate midline.

Protibia: 0.44 mm long. 0.13 mm wide; with 8 spines on outer edge; apical spines inserted on moderately long digits; WLR: 0.60; posterior face sparsely covered by yellow setae.

Aedeagus slender and straight; apical lobe slightly curved; ending in acute apex; few sensillae on inner edge of apical lobe.

Osoriellus cordovensis ( BERNHAUER 1910)   new combination

( Figs 109 View Fig A-C, 123C)

Osorius cordovensis BERNHAUER, 1910: 360  

Type material examined: Mexico: Veracruz, Cordoba (18°52'N, 96°55'W) male without further data (holotype in FMNH) GoogleMaps   .

Further material examined: Mexico: Union Juarez, NW slope Vulc. Tacaná, leaf litter trop. rain forest, Rio de Finca Muxbal ( GUAT)   , 1430 m elevation, 3 males, 3 females, 21.12.1976, H. Frania & D. Proctor ( AMNH, UIC)   ; Puebla, Santa Lucia , 8 km SW Cuetzalan (97°31.0'W, 20°01.60'N), female, 25.12.1973, leg. J. Reddell ( AMNH) GoogleMaps   ; Jalisco, 4 mi W Mazamitla (103°01.22'W, 19°54.88'N), 2300 m elevation, 16.10.1950, leg. R.F. Schmith GoogleMaps   ; Chiapas, San Juan Pananá (92°30.41'W, 15°23.92'N), Cultivo de café y Selva Med. Per. , en hojarasca y rocas de riachuelo, 1 specimen, 22.11.1999, leg. J. Marquez ( JMC) GoogleMaps   ; Tlayacapan (98°58.49'W, 18°57.17'N), Morelos, Camino a Sta Catarina, Zone   4 Selva baja ceducifolia, ex hojaresca, 1 specimen, 2.11.1996, leg. J. Marquez ( JMC) GoogleMaps   ; Zacualtipan, cam. a StO. Domingo, Bosque mesófilo de montana, en troncos, 1 specimen, 29.12.2003, leg. J. Marquez ( JMC)   ; Hidalgo, Tlanchinol, 4.4 km N., Hwy 105, under bark/logs, 1420 m elevation, 2 specimens, 6.7.1992, leg. J.S. Ashe ( SEM)   ; Vercaruz, Catemaco , 32 km N, 1 specimen, 3.1.1982, leg. E.M. May ( KNHM)   ; 1 male, 2 females without more data ( SDEI)   ; Nicaragua: Granada (85°57'W, 11°55'N), Res. Nat. Volcan Mombacho, under bark, 1 specimen, 2.02.2000, leg. J. Marquez ( JMC) GoogleMaps   .

Diagnosis: The species is very similar to O. mexicanus   in the size, the shape of the pronotum, and the absent microsculpture of the head and pronotum. It can be differentiated from that species by the darker colour, the denser punctation of the pronotum, and the digitate protibia.

Description: Length: 5.3 mm, Colouration: Dark brown; posterior edge of pronotum and elytra reddish; legs and antennae yellow.

Head: 0.75 mm long, 0.90 wide; coarsely and densely punctate except wide midline and moderately large area at base of antennae; interstices between setiferous punctures much shorter than diameter of punctures; supraoculare space coriaceously punctuate; surface without microsculpture and polished except postocular vertex with dense netlike microsculpture and matt surface.

Antennae with second and third antennomeres equally long, fourth to sixth antennomeres approximately quadrate; following antenomeres distinctly thicker.

Pronotum: 0.95 mm long, 1.00 m wide; widest at anterior angles; evenly convergent to posterior angles; posterior angles obtusely rounded; lateral margin extremely fine; in dorsal aspect, nearly invisible in anterior third; setiferous punctation coarse and deep; partly coriaceous; interstices between punctures less than half the diameter of punctures; on each side of smooth midline with row of approximately 11 punctures; laterally, punctures in irregular rows; surface without microsculpture, but with sparse micro-punctation; polished.

Elytra: 1.10 mm long, 1.10 mm wide; with coriaceous ground-sculpture and rows of deep and dense punctures; interstices between punctures much shorter than diameter of punctures; surface slightly shiny.

Abdomen distinctly and densely punctate except moderately wide midline; each puncture with long yellow seta.

Protibia: 0.73 mm long, 0.23 mm wide; thick, nearly semi-circular; with 10 spines on outer edge; apical three spines inserted on moderately long digits; WLR: 0.67; in posterior aspect, comb at inner emargination visible throughout its total length; posterior face densely coverd by thick yellow setae.

Aedeagus angulate in nearly rectangular angle; apical lobe long and slender and slightly sinuate to apex; apex nearly acute; inner side of apical lobe with three sensillae at middle.

KNHM

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

NMNH

Smithsonian Institution, National Museum of Natural History

AMNH

American Museum of Natural History

SMNH

Department of Paleozoology, Swedish Museum of Natural History

FMNH

Field Museum of Natural History

GUAT

Museo Nacional de Historia Natural

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Osoriellus

Loc

Osoriellus adustus

Irmler, Ulrich 2014
2014
Loc

Osorius carinicollis

NOTMAN, H. 1925: 7
1925
Loc

Osorius cordovensis

BERNHAUER, M. 1910: 360
1910