Urosigalphus triacarinae Arias-Penna

Carolina, Diana & B, James, 2012, A taxonomic revision of the Colombian species of Urosigalphus Ashmead (Hymenoptera: Braconidae), Zootaxa 3411, pp. 1-54 : 48-50

Urosigalphus triacarinae Arias-Penna , n. sp.

Figs. 22 A–G

Male.— Body length 2.25 mm.

Body color ( Fig. 22 A): mainly black. Flagellomeres and scape dark brown; pedicel apically yellow-brown, but basally dark brown. Annellus, labrum and mandible yellow-brown. Mandibular teeth red-brown. Labial and maxillary palps yellow. Fore and mid legs yellow, but hind legs brown except apical third of coxa, trochanter, trochantellus and anterior third of both femur and tibia yellow. Fore wing ( Fig. 22 G): tegula yellow, stigma light brown. Membrane and microtrichiae of fore wings brown, hind wings with hyaline membrane and microtrichiae. Carapace dark brown.

Head ( Figs. 22 A–B). — Subtriangular. Antenna with 12 flagellomeres; first three flagellomeres longer than wide (0.15:0.05; 0.15:0.05; 0.15: 0.05 mm); last five, except the last one, longer than wide (0.09:0.04; 0.09:0.04; 0.09:0.04; 0.10:0.04; 0.10: 0.04 mm); apical flagellomere longer than penultimate (0.12: 0.09 mm); scape smaller than first flagellomere (0.12: 0.15 mm) and of same width as pedicel and first flagellomere (0.06:0.05: 0.05 mm); pedicel more than half as long as scape (0.07: 0.12 mm). Torulus ( Fig. 22 B) located above midline of the eye. Frons with a deep, wide and longitudinal median groove that runs from upper half of lower face to the frons; groove narrower ventrally than dorsally, groove reaching dorsal margin of median ocellus; inside with a mesh of wavy longitudinal carinae; each side of groove elevated laterally and defined by carinae which end before reaching median ocellus. Scrobes shallow, wide, not surrounded by a carina and completely smooth and shiny; scrobes do not reach dorsal part of median ocellus. Lower face ( Fig. 22 B) flat or nearly so with small, dense and homogeneous punctures. Fronto-clypeal suture strongly impressed, round and with sculpture. Anterior tentorial pit embedded within a strong depression. Clypeus flat with small and sparse punctures and apically smooth; interspaces wide, shiny; apical part reflexed, narrow, but defined by a strong edge, although laterally with a short carina. Labrum with very sparse and small punctates, interspaces smooth. Mandible ( Fig. 22 B) long, slender with transverse strigates, mandible set with two sharp teeth, superior teeth longer than inferior; both teeth with sharp apex. Maxillary palps longer than labial. Ocelli oval, lateral ocelli distant from each other, separated by more than the width of lateral ocellus (0.09: 0.05 mm) and carinated only in the inner side. Stemmaticum elevated into a weak projection with highest point concave, stemmaticum with a deep, longitudinal median groove which rises laterally and forms the carinae that surround only inner side of lateral ocelli. Eyes without preorbital carina. Vertex with small and irregular areolae, without longitudinal median carina, with a smooth central area close to occiput. Occiput flat, smooth and shiny. Occipital carina present only laterally. Temple and gena scabrous.

Mesosoma ( Figs. 22 A, C–D, F). — Projection of propleuron blunt. Pronotum ( Fig. 22 C) anteriorly and curvature of pronotum with large punctates, but remaining punctates small. Pronotal lobe ( Fig. 22 C) sloped toward tegula; point of inflexion carinated; sloped area with deep depressions, apex truncate. Mesoscutum uneven; lateral mesonotal lobes with small, dense punctures; anteriorly sloped, posteriorly convex; edge of lateral lobes with elongated and homogeneous foveae throughout; median mesonotal lobe with scarce, small punctures, interspaces with irregular surface; median mesonotal lobe with three carinae: one longitudinal and two transverse ones; continuous longitudinal median carina less than half as long as median mesonotal lobe with highest point apically and end posteriorly with areolae; continuous antero-transverse carina runs from one end to the other througout the edge, the other antero-transverse carina present only laterally, absent in great part of central median lobe and below the first one; area of convergence of notauli with large, irregular areolae, without a defined shape. Notauli strongly impressed with large, elongate foveae throughout; notauli near edge of transscutal articulation and without additional row of foveae along the entire length. Scutellum convex, triangular, on same plane as mesoscutum ( Fig. 22 C), with areolae arranged in four longitudinal rows, areolae of different sizes and very close to each other; posteriorly slightly sloped, but on same vertical plane as posterior scutellar depression; scutellar sulcus with four deep, uneven foveae; posterior scutellar depression with two elongate, large foveae that fill the whole smooth area. Middle part of metanotum, below posterior scutellar depression, with a weak posterior projection. Propodeum antero-posteriorly short, symmetrical ( Fig. 22 D); crossed by high MLC projected ( Fig. 22 C); ATC high, strong and wavy; AMA absent; posterior wall of propodeum flat, with areolae of different sizes. Metapleuron with large, irregular areolates. Mesopleuron ( Fig. 22 C) with epicnemial carina, but lacks sternaulus; mesopleuron convex; shiny central area with some sparse, small punctures; dorsally with a large, transverse depression below tegula and a group of large areolae forming a sub-rectangle band below transverse depression; ventrally with a L-shaped dent with foveae of different sizes; anteriorly with elongate, narrow, flat area that bears small, dense punctures throughout the edge; posteriorly scrobiculate. Mesosternum ( Fig. 22 F) convex with a complete central row of foveae not surrounded by carina; with small and sparse punctures, laterally delimited by two oblique carinae on each side; mesosternum near fore coxa with a high transverse lamella of same height throughout; mesosternum near mid coxa with areolae surrounded by a semicircular carina above the mid coxa, semircicle carina intercepted by both lateral carinae.

Wings ( Figs. 22 A, G). — Fore wing ( Fig. 22 G): vein M+CU markedly curved (sinuate); vein 3RSb tubular, distant from stigma (0.15 mm); subbasal cell longer than basal (0.78: 0.75 mm); stigma short, relatively rounded. Fore wing: length 1.60 mm, width 0.67 mm; hind wing: length 1.35 mm, width 0.40 mm.

Metasoma ( Figs. 22 A, E). — Carapace in lateral view teardrop-shaped ( Fig. 22 E); anteriorly with strong substrigulae that cross the anterior half of the carapace; area between the carinae with areolae. Apex of carapace with two straight tubercles of equal size (length 0.08 mm); area above tubercles (teeth) convex; tubercles with blunt apex, separated by twice the width of the base of the tubercle (0.06: 0.03 mm). Carapace with irregular areolates apically. Carapace length 1.08 mm.

Female.— Unknown.

Biology.— Unknown.

Material examined.— Holotype, male, Colombia: Bolívar SFF [Santuario de Fauna y Flora] Los Colorados, Alto el mirador, 9º54`N 75º7´W, 400m, Malaise, 6–21.xii.2001, E. Deulufeut leg., M. 2628, IAvH-E 34295. Deposited in IAvH-E.

Etymology.— From tres, tria (Latin, number) = three and carina (Latin, noun, femenine) = the keel of a ship. The name refers to the three carinae in the median mesonotal lobe.

Figures

FIGURE 22. Urosigalphus triacarinae n. sp. (A) habitus; (B) head, frontal view; (C) mesosoma, lateral view; (D) mesosoma, dorsal view; (E) carapace, lateral view; (F) mesosternum; and (G) fore wing.