Debilos dialeucor Scherrer, 2012

Scherrer, Marcus V. & Aguiar, Alexandre P., 2012, 3469, Zootaxa 3469, pp. 1-76 : 17-18

Debilos dialeucor Scherrer , sp. nov.

( Figs 55, 72, 74, 94, 125)

Description. Female. Fore wing 10 mm. Head ( Fig. 116): Antenna with 31 flagellomeres. Clypeus smooth, sparsely punctate towards apex, markedly convex, most prominent ventrally, CWH 1.62; MWC 0.59, MLW 1.87, MWW 0.48; malar space moderately long, MSM 1.22; 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. 94). Pronotum lateral portion next to collar inconspicuously strigate-rugose, next to mesopleuron inconspicuously corrugated, epomia faint; notaulus inconspicuously impressed, uniformly sculptured with mesoscutum, reaching about middle of mesoscutum; mesopleuron dorsal half medially faintly strigulaterugulose, ventral half without distinct ridges or rugae, epicnemial carina restricted to ventral 0.6 of mesopleuron, posteriorly inconspicuously, densely corrugated; mesopleural groove markedly, sparsely corrugated; sternaulus entirely markedly corrugated; postpectal carina medially slightly to distinctly bent; metapleuron, subapical fovea shallow, subcircular; pleural carina moderately stout; propodeum anterior area short, PLL 0.48, anterior transverse carina distinct, complete, medially distinctly arched forwards, posterior area strigulate-rugulose, with faint ridges medially slightly arched backwards, spiracle distinctly elliptic, SWL 2.23 ( Fig. 55), propodeal apophyses short, conical, AHD 0.88. Legs: Hind t4 posterior lobe about 0.95 × as long as anterior lobe ( Fig. 72). Fore wing vein (Rs+M)b slightly but uniformly curved, 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 0.2 × 1cu-a length, angle with vein M+Cu about 90 degrees; vein 2Cua about same size of crossvein 2cu-a, FWC 0.88; areolet small, APH 0.85; vein 2Ma approximately as long as 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 2.70.

Metasoma ( Fig. 94). T1 petiole basal half smooth towards base, apical half, postpetiole coriarious-punctulate, except pospetiole apical parts centrally smooth, sparsely punctulate, spiracle at about basal 0.6, inconspicuously prominent, T1LW 2.87, T1WW 3.16, T1GL 0.30; T2 moderately short, apically robust, T2T1L 0.76, thyridium distinctly longer than wide, T2LW 1.19, T2WW 1.82. Ovipositor slightly but uniformly downcurved, OST 0.66, dorsal valve with nodus faint, notch present; ventral valve tip with inconspicuous serrations restricted to very tip.

Color. Head, mesosoma, legs and metasoma black. Head: Dorsal portion of flagellomeres 5–9 and mouth parts, except mandible, white; clypeus with central spot whitish (252, 233, 172) ( Fig. 74); mandible apex before teeth dark brown (055, 023, 009). Mesosoma: Propodeal apophyses white. Legs: Fore and mid coxae apical margin often slightly whitish; trochanters apical margin white; fore femur anteriorly whitish towards apex; fore and mid tibiae anteriorly and posteriorly pale yellow (222, 194, 099); fore and mid tarsomeres brownish (180, 104, 061). Wings: Hyaline. Metasoma: T1 apical margin with central semicircular mark light brown; T 2–8 black, sometimes brownish towards apex, apical margin of T2 and 3 often whitish; sternites medially white; ovipositor sheath dark brown, except basal 0.75 ventrally whitish; ovipositor brown (144, 088, 056).

Male. Unknown.

Variability. Holotype more pilose than paratypes. Color: Flagellomere 10 basal parts sometimes white; clypeus central point sometimes spectral, although always present; extension and brightness of lightest marks on legs variable.

Comments. Included in the D. soror species group (see item Species Delimitation). Individuals of D. dialeucor are easily recognizable among all other species of the group by having the clypeus centrally with a small whitish spot (vs. entirely black in D. dnopheror and D. palaior , or entirely or mostly white in D. soror ). However, D. dialeucor is similar to large specimens of D. dnopheror because of their related general morphology and black coloration, but differs from it in having the hind t4 lobes of approximately equal size, posterior lobe about 0.95 × as long as anterior lobe (vs. lobes of unequal size, posterior lobe about 0.67 × as long as anterior lobe), T1 spiracle inconspicuously prominent (vs. not prominent), and apical margin of coxae slightly whitish (vs. distinctly whitish). Mostly because its black coloration, it can also resemble individuals of D. palaior , but can be separated from those by having a fainter general sculpturing and strigation at body structures, such as the pronotum lateral portion next to collar inconspicuously strigate-rugose, next to mesopleuron inconspicuously corrugated (vs. distinctly strigate to rugose), epomia delicate (vs. moderately stout), and mesopleuron dorsal half medially faintly strigulate-rugulose, ventral half without distinct ridges or rugae (vs. dorsal half medially strigulate, ventral half posteriorly strigate with ridges taking mesopleural groove). Furthermore, the color pattern of D. dialeucor also differs from D. palaior by having the wings hyaline (vs. with uniform yellowish tint) and coxae apical margin whitish (vs. coxae entirely black).

Etymology. From the Greek word dialeukon, meaning “marked with white,” in reference to the clypeus with a central white mark in this species.

Distribution. Brazil. From two localities of Pará: Floresta Nacional de Caxiuanã, Melgaço (02°04’54”S 51°51’05”W), and Pojuca, Serra Norte ( Fig. 125).

Material Examined. 4 ♀. Holotype ♀ from BRAZIL, Pará , Melgaço , Floresta Nacional de Caxiuanã , Estação Científica Ferreira Pena, Trilha, 16–19.IX.2003, yellow pan trap at the beginning of the bridge (middle of trail), APAguiar & JDias, P05060 ( UFES) . In good shape, mounted on triangle point. Paratypes: BRAZIL: 2 ♀ from Pará , Melgaço , Floresta Nacional de Caixuanã, Trilha Igarapé Curua, 23–26.IX.2003, APAguiar & JDias ( UFES) ; 1 ♀ from Pará , Serra Norte, Pojuca, 22.I.1985, PTadeu, Debilos sp. MCGonçalvez det. 2004, MPEG HYM 11006402 ( MPEG) .