Debilos okarum Scherrer, 2012

Scherrer, Marcus V. & Aguiar, Alexandre P., 2012, 3469, Zootaxa 3469, pp. 1-76 : 29-30

Debilos okarum Scherrer , sp. nov.

( Figs 41, 105, 146)

Description. Female. Fore wing 4.75 mm. Head: Antenna with 25 flagellomeres. Clypeus punctate, moderately convex, regularly curved, CWH 1.79; MWC 0.79, MLW 1.64, MWW 0.36; malar space moderately long, MSM 1.09; supra-antennal area with faint, median, longitudinal carina; minimum distance from eye margin to occipital carina laterally approximately same width of mandible base.

Mesosoma ( Fig. 105). Pronotum lateral portion next to collar inconspicuously strigate-rugose, next to mesopleuron inconspicuously corrugated, epomia inconspicuous; notaulus moderately impressed, distinctly corrugated, not reaching middle of mesoscutum ( Fig. 41); mesopleuron dorsal half medially inconspicuously strigulate-rugulose, ventral half without distinct ridges or rugae, epicnemial carina restricted to ventral 0.7 of mesopleuron, posteriorly inconspicuously, sparsely corrugated; mesopleural groove faintly, sparsely corrugated; sternaulus anterior half faintly corrugated; postpectal carina medially distinctly bent; metapleuron, subapical fovea shallow, subcircular; pleural carina stout; propodeum anterior area very long, PLL 1.22, anterior transverse carina distinct, complete, slightly, uniformly curved, posterior area faintly strigate-rugose, with faint ridges medially distinctly arched backwards, spiracle distinctly elliptic, SWL 2.00, propodeal apophyses long, thorn-shaped, AHD 2.60. Legs: Hind t4 posterior lobe about 0.5 × as long as anterior lobe. Fore wing vein (Rs+M)b perfectly straight, limit with crossvein 1m-cu distinct, ramellus absent; vein Rs&1M uniformly slightly curved; crossvein 1cu-a posteriorly slightly convex, arising distinctly apicad vein Rs&1M, by about 0.2 × 1cu-a length, angle with vein M+Cu about 90 degrees; vein 2Cua moderately shorter than crossvein 2cu- a, FWC 0.71; areolet small, APH 0.88; vein 2Ma distinctly longer than vein 2Mb; vein 2Mb tubular; crossvein 2m-cu with bulla short, about 0.2 × as long as vein length or shorter; vein 2Rsb sinuous. Hind wing vein 2-1A long, reaching about 0.8 × the distance to wing margin, HWC 1.50.

Metasoma ( Fig. 105). T1 petiole basal half smooth towards base, apical half, postpetiole coriarious-punctulate, except pospetiole apical parts centrally smooth, sparsely punctulate, spiracle at about basal 0.7, prominent, T1LW 2.93, T1WW 2.95, T1GL 0.32; T2 moderately short, apically robust, T2T1L 0.71, thyridium distinctly longer than wide, T2LW 0.86, T2WW 2.32. Ovipositor approximately straight, OST 0.45, dorsal valve with nodus absent, notch absent; ventral valve tip with inconspicuous serrations restricted to very tip.

Color. Head black, mesosoma and legs brown (112, 087, 043), metasoma mostly dark brown (071, 056, 042). Head: Pedicel slightly and flagellomeres 6–9 entirely white; mouth parts whitish (218, 216, 195), except mandible apex blackish. Mesosoma: Collar dorsally and propodeal apophyses white; propleuron darker than pronotum, except ventro-lateral corner whitish; mesoscutum medially with centro-posterior square dark mark ( Fig. 41). Legs: Fore coxa apical 0.4–0.6, mid coxa apical margin, fore and trochanter white, except fore and mid trochanters dorsal portion dark brown; fore and mid tibiae anteriorly and posteriorly and hind tibia basal 0.2 pale yellow (241, 224, 144) to whitish. 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: Basally blackish, changing to dark brownish (096, 075, 046) towards apex; T1 apical 0.2 and T2 apical 0.3 with white stripe, T2 stripe central 0.6–0.7 anteriorly concave, concavity apex reaching about 0.4–0.8 stripe width; T3–7 darkest towards base; T3 and 4 apical margin lightest; T6 apical margin, T7 mostly and T8 entirely dorsally, and sternites medially white; ovipositor sheath dark brown, except basal 0.8 ventrally whitish; ovipositor light brown (187, 144, 084).

Male. Unknown.

Variability. Color: Flagellomere 4 apical parts sometimes white; mesosoma color orangish brown (188, 093, 032) to brownish; extension and brightness of lightest marks on legs and metasoma variable.

Comments. Included in the D. typurum species group (see item Species Delimitation). Within its species group, D. okarum , along with D. masipum , D. sanimum , and D. makirum are the only ones to have the mesoscutum with a medial, centro-posterior square dark mark. Nevertheless, D. okarum can be readily isolated from those by having the following combination of features: flagellomere 1 and hind tarsus without whitish marks, coxae entirely brownish, and metasoma without yellowish areas. Debilos okarum is also similar to D. pekujum because of their brown coxae, but differs from it by having the flagellomere 1 without white mark (vs. white), mesoscutum medially with centro-posterior square dark mark (vs. without medial dark mark), postpectal carina medially distinctly Vshaped (vs. straight), and fore wing with two dark spots (vs. with only one apical dark spot).

Etymology. From the Carib word okaru, meaning “darkness,” in reference to the hind coxa and tarsomeres dark-coloured in this species.

Distribution. Bolivia, from one locality of La Paz: Apa-Apa (16°22’S 67°30’W) ( Fig. 146).

Material Examined. 3 ♀. Holotype ♀ from BOLIVIA, La Paz, Chulumani Apa-Apa , 1800m, 16°22’S 67°30’W, 01–04.V.1997, yellow pans, B9–11, LMasner ( CNCI) . In good shape, mounted on triangle point. Paratype: BOLIVIA: 1 ♀ from La Paz, Chulumani Apa-Apa , 1800m, 16°22’S 67°30’W, 01–04.V.1997, yellow pans, B9–11, LMasner ( CNCI) ; 1 ♀, same data except B9–1 ( CNCI) .