Glyptoma crassicorne ERICHSON, 1840

Irmler, Ulrich, 2015, The neotropical genus Glyptoma ERICHSON, 1839 with descriptions of new species and a key to the species (Coleoptera: Staphylinidae: Osoriinae), Beiträge Zur Entomologie = Contributions to Entomology 65 (2), pp. 297-325 : 306-308

Glyptoma crassicorne ERICHSON, 1840

( Figs 7A, B , 21A )

Glyptoma crassicorne ERICHSON, 1840: 908

Glyptoma cribellum SHARP, 1887: 724 new synonymy

Type material examined: Glyptoma crassicorne 3 female syntypes: Colombia: Novae Valencia , without further data ( ZMHU) .

Glyptoma cribellum SHARP, 1887 , male syntype: Guatemala: El Tumbador , leg. G. C. Champion ( BMNH); 1 male, 1 female syntypes with same data ( BMNH); male syntype, Capetilla leg. G. C. Champion ( BMNH) ; female syntype, Zapote, leg. G. C. Champion ( BMNH) .

Further material examined: Mexico: 2 females, Chiapas, 4 km N of Escuintla , under thin bark log, sap not sticky, lowland rainforest, 120 m elev., leg. H. Frania, #34 ( AMNH) ; Belize: Cayo, Las Cuevas Research Station (88°58.24'W, 16°44.00'N), 650 m elevation, 2 males collected by flight intercept trap, 22.– 26.5.2000, leg. M. Caterino ( BMNH) ; Nicaragua: 1 female, Matagalpa Dept, 6 km N Matagalpa, Selva Negra Hotel, Bavaria Trail (85°54.53'W, 12°59.99'N), 1240 m elev., collected by flight intercept trap, 18.– 21.5. 2002, leg. R. Brooks & Z. Falin #NIC1BFC02036 ( KNHM) ; 2 females, Granada Dept., Res. Nat. Volcan Mombacho , entrance rd., 910 m elev., collected by flight intercept trap, 1.– 5.6.2002, leg. R. Brooks, Z. Falin & S. Chatzimanolis #NIC1BFC02189 ( KNHM) ; Costa Rica: 1 male, 1 female, Puntarenas, 7 km S Quepos , 10.2.1985, leg. L. Herman #2104 ( AMNH) ; 6 male, 9 females, Corcovado National Park, Sirena Stn., lower Ollas Trail (83°24.48'W, 8°24.48'N), 5 m elev., on/ under bark, 25.6.2000, leg. Z. H. Falin #CR1ABF00006A ( KNHM, UIC) ; 2 males, same region, junc. Gunacaste- Sirena Trails (83°35.46'W, 8°28.55'N), 5 m elev., under bark, 30.6.2000, leg. Z. H. Falin #CR1ABF00051 ( KNHM) ; 3 males, 5 females, Golfito , 10–200 m elev., under bark, 28.5.1993, leg. J.&A. Ashe #067 ( KNHM, UIC) ; 6 males, 2 female, Las Cruces Biol. Stn. (82°5758'W, 8°4714'N), 1330 m elev., under bark, 30.5.2004, J. S. Ashe, Z. H. Falin & I. Hinojosa #CR1AFH04045 ( KNHM, UIC) ; 9 males, 4 females, Guanacaste, Maritza, Biological Station (85°29'W, 10°58'N), under bark, 4.5.1995, leg. J. S. Ashe ( KNHM, UIC) ; male, same location, 550 m elev., but collected by flight intercept trap, 22.5.1993, leg. J. & A. Ashe #036 ( KNHM) ; 1 female, Patilla Biological Station (85°25'W, 10°58'N), 650 m elev., under bark, 2.5.1995, leg. J. S. Ashe ( KNHM) ; same region, 550 m elev. bracket mushrooms, 21.5.1993, leg. J. & A. Ashe #033 ( KNHM) ; Limòn, Rd. Bribri> Bratsi (9°33.45'–35.45'N, 82°52.50'–53.17'W) 30–50 m elev. along river bank, secondary forest, Fincas , coll. By car net, 2.12.2013, leg. M. Schülke & B. Grünberg ( MSC) ; Panama: Canal Zone, Albrook Forest Site, ground, collected by black light trap, 18.– 19.4.1968, leg. R.S. Hutton ( AMNH) ; 1 female, Cerro Campana, nr. Capira (79°57'W, 8°44'N), 790 m elev., under bark, 18.5.1995, leg. J. S. Ashe #021 ( KNHM) ; female, Gamboa-Pipeline Rd. area , recently fallen tree, 1.6.1996, leg. S. Lingafelter ( KNHM) ; 1 female, Hornito, Finca La Suiza (82°12'W, 8°39'N), 1220 m elev., collected by flight intercept trap, 3.6.2000, leg. H. & A. Howden ( KNHM) ; Panama, Cerro Jeffe (79°21'W, 9°12'N), 700 m elev. 16.1.1972, leg. Stockwell ( BMNH) ; Venezuela: 2 males, 1 female, Carabobo, Mun. Bejuma, Quebrada, Aqua Clara (61°24'W, 6°18'N), 300 m elev., leg. Wachtel & L. Brachat ( VAC, UIC) ; Guyana: 3 males, 3 females, Region 8, Iwokrama Forest, Pakatau hills (59°01.36'W, 4°44.54'N), 70 m elev., under bark, 28.5.2001, leg. R. Brooks & Z. Falin #GUY1BF01052 ( KNHM, UIC) ; French Guiana: male, Saül, 7 km N, Les Eaux Claires (53°13.19'W, 3°39.46'N), 220 m elev. fungusy log, 31.5.1997, leg. J. S. Ashe & R. Brooks #FG1AB97094 ( KNHM) ; Suriname: 2 female, Saramacca, West Suriname Road , 108 km WSW Zanderij Airport (55°52.54'W, 5°13.37'N), 30 m elev., under bark, 9.6.1999, leg. Z. H. Falin #SUR1 F99044 ( KNHM) ; Ecuador: male, Pastaza Prov., Kapawi (76°49.12'W, 2°33'S), collected by Malaise trap, 20.– 28.3.1996, leg. P. Hibbs #ECU2H96006A ( KNHM) .

Diagnosis: G. crassicorne is characterised by the deeply sculptured pronotum with shiny surface. The surface of the head is partly covered by a weak isodiametric microsculpture. The distinctness of the head microsculpture slightly varies between the specimens. But the surfaces of the head and the pronotum are always shiny. Considering the slight variance in the microsculpture, no differences could be found between SHARP’s G. cribellum and ERICHSON’s G. crassicorne . Therefore, G. cribellum is synonymised to G. crassicorne , although the type specimens of G. crassicorne are all females and, thus, a comparison between the aedeagi could not be performed. The differences in size mentioned bySCHEERPELTZ (1970) cannot be confirmed. The type specimens of G. crassicorne are 2.8 mm long and not 3.25 mm as published by SCHEERPELTZ (1970). G. crassicorne extremely resembles G. lescheni spec. nov. in size, deep ground sculpture of the pronotum, and the aedeagus. The two species can be distinguished by the distinct microsculpture of the head and pronotum in G. lescheni spec. nov.

Description: Length: 2.5–2.8 mm. Colouration: Black; antennae dark brown, legs slightly lighter brown.

Head: 0.30 mm long, 0.44 mm wide; prominent eyes large; 1.5 times as long as temples; temples cheek-like; narrowed to neck in short convex curve; posterior edge of head emarginate; sides in front of eyes shortly concave; then approximately parallel to base of antennae; clypeus short; narrowed in sinuate curve to anterior edge; anterior margin 1/3 as wide as width between base of antennae; setiferous punctation dense and extremely deep; on average, interstices between punctures less than half as wide as diameter of punctures; extremely weak microsculpture; close to neck isodiametric and slightly denser; surface shiny.

Antennae slightly longer than head and pronotum combined; first antennomere slightly thicker than second; second antennomere twice as wide as long; following antennomeres as wide as second and wider than long; penultimate antennomeres slightly longer than basal antennomeres; only slightly wider than long; all antennomeres with few long yellow setae; setae maximum as long as length of antennomere.

Pronotum: 0.37 mm long, 0.43 mm wide; widest at middle; narrowed to anterior obtuse angles in smooth convex curve; posterior half deeply emarginate; posterior edge not wider than width of mesonotum; interstices between pseudo-punctures reduced to narrow ridges; partly coriaceous; setiferous punctation on ridges between deep and coarse pseudo-punctures; microsculpture weak or absent; surface shiny.

Elytra: 0.59 mm long, 0.55 mm wide; sides smoothly rounded from shoulders to posterior angles; widest near middle; shoulders distinct, but obtusely rounded; discal carinae distinct from anterior margin to posterior margin; lateral carinae absent; pseudo-punctures on pronotum less deep than on pronotum; in area between suture and discal carina three irregular longitudinal rows of pseudo-punctures; inner row directly adjacent to suture; two irregular rows between discal carina and line from shoulders to posterior angles; interstices between pseudo-punctures restricted to narrow ridges; surface of pseudo-punctures and ridges with dense and deep microsculpture; setiferous punctation on ridges; surface totally matt.

Abdomen with similar large and dense pseudo-punctures as on elytra; pseudo-punctures equal on all segments; interstices between pseudo-punctures reduced to extreme narrow ridges; setiferous punctation on ridges between grooves; surface with dense and deep isodiametric microsculpture; matt.

Aedeagus strongly curved; angle between basal and apical lobe obtuse; nearly rectangular; apex acute; sides of apical lobe with numerous sensillae; sensillae denser at apex than close to basal lobe; paramere thin and short; only reaching half of apical lobe.

Figures

Figs 21: Fore body of Glyptoma crassicorne (A), G. lescheni (B), G. guianense (C), G. amazonense (D), G. guadelupense (E), G. hirticorne (F); scale bar 0.5 mm.

Figs 7–12: Aedeagus (A) and antenna (B) of Glyptoma crassicorne (7), G. lescheni (8), G. guianense (9), G. amazonense (10), G. guadelupense (11), G. hirticorne (12); scale bar: 0.1 mm.