Debilos melachrosatum Scherrer, 2012

Scherrer, Marcus V. & Aguiar, Alexandre P., 2012, 3469, Zootaxa 3469, pp. 1-76 : 27-28

Debilos melachrosatum Scherrer , sp. nov.

( Figs 120, 137)

Description. Female. Fore wing 6.16 mm. Head: Antenna with 29 flagellomeres. Clypeus very sparsely punctate, markedly convex, most prominent ventrally, CWH 1.81; MWC 0.52, MLW 2.27, MWW 0.45; malar space long, MSM 1.73; supra-antennal area with faint, median, longitudinal carina; minimum distance from eye margin to occipital carina laterally distinctly longer than mandible base.

Mesosoma ( Fig. 120). Pronotum lateral portion next to collar sub-laterally inconspicuously strigate-rugose, next to mesopleuron inconspicuously corrugated, epomia indistinct; notaulus moderately impressed, uniformly sculptured with mesoscutum, reaching about middle of mesoscutum; mesopleuron without distinct ridges or rugae, epicnemial carina restricted to ventral 0.8 of mesopleuron, posteriorly inconspicuously, densely corrugated; mesopleural groove moderately corrugated; sternaulus anterior half faintly corrugated; postpectal carina medially distinctly bent; metapleuron, subapical fovea shallow, subcircular; pleural carina stout; propodeum anterior area moderately long, PLL 1.08, anterior transverse carina distinct, complete, medially distinctly arched forwards, posterior area without distinct ridges or rugae, uniformly colliculate with anterior area, spiracle distinctly elliptic, SWL 1.60, propodeal apophyses long, thorn-shaped, AHD 2.41. Legs: Hind t4 posterior lobe about 0.44 × as long as anterior lobe. Fore wing vein (Rs+M)b nearly straight, limit with crossvein 1m-cu indistinct, ramellus absent; vein Rs&1M posteriorly slightly curved; crossvein 1cu-a posteriorly slightly convex, arising distinctly apicad vein Rs&1M, by about 0.4 × 1cu-a length, angle with vein M+Cu about 90 degrees; vein 2Cua about same size of crossvein 2cu-a, FWC 1.11; areolet moderately large, APH 1.00; vein 2Ma approximately as long as vein 2Mb; vein 2Mb spectral; crossvein 2m-cu with bulla short, about 0.2 × as long as vein length or shorter; vein 2Rsb slightly sinuous. Hind wing vein 2-1A long, reaching about 0.7 × the distance to wing margin, HWC 1.60.

Metasoma ( Fig. 120). T1 finely coriarious, spiracle at about basal 0.6, prominent, T1LW 3.77, T1WW 2.32, T1GL 0.33; T2 moderately short, apically robust, T2T1L 0.65, thyridium subcircular, T2LW 0.89, T2WW 2.71. Ovipositor approximately straight, OST 0.54, dorsal valve with nodus absent, notch absent; ventral valve tip with inconspicuous serrations restricted to very tip.

Color. Head, mesosoma, legs and metasoma black. Head: Flagellomeres 6–9 entirely white; mouth parts whitish (218, 216, 195), except mandible black. Mesosoma: Collar medially and propodeal apophyses white. Legs: Fore coxa apical 07–0.6, mid coxa apical 0.3, hind coxa and trochanter apical margin, trochantellus basal margin and tibia basal 0.2 white; fore and mid trochantellus apical margin, femora basal margin, tibiae and tarsi, and hind tarsus lightest. Fore wing with two large, marked dark spots, taking cell 3M apical half up to cell 3R1 basal portion, and cell 1Cu apical parts, and respective surrounding areas. Metasoma: T1 apical 0.2 and T2 apical 0.3 with white stripe, T2 stripe central 0.3 anteriorly slightly concave; thyridium distinctly and sternites medially slightly lightest; T6 apical margin, and T7 and T8 dorsally white; ovipositor sheath blackish, except basal 0.6 ventrally whitish; ovipositor light brown (187, 144, 084).

Male. Unknown.

Variability. Unknown.

Comments. Included in the D. trochanteratum species group (see item Species Delimitation). Of all seven species in this group, D. melachrosatum is the most distinct, and can be recognized by having the legs black, epicnemial carina taking ventral 0.8 of mesopleuron, postpectal carina medially distinctly bent, propodeal spiracle distinctly elliptic, SWL 1.60, and ventral valve tip with inconspicuous serrations restricted to very tip, whereas all the other D. trochanteratum species group have legs brownish or yellowish, epicnemial carina restricted to ventral 0.5–0.7 of mesopleuron, postpectal carina medially straight or slightly arched backward, propodeal spiracle subrounded, SWL 1.00–1.25, and ventral valve tip without distinct serrations.

Etymology. A combination of the Greek words melas, meaning “black,” and chros, meaning “skin,” in reference to the body surface mostly black in this species.

Distribution. Bolivia. Apa-Apa, La Paz (06°22’S 67°30’W) ( Fig. 137).

Material Examined. Holotype ♀ from BOLIVIA, La Paz, Chulumani, Apa-Apa , 06°22’S 67°30’W, YPT B9– 11, LMasner leg. ( CNCI). Right anterior leg glued to triangle, otherwise in good shape, mounted on triangle point.