Debilos labeculatum Scherrer, 2012

Scherrer, Marcus V. & Aguiar, Alexandre P., 2012, 3469, Zootaxa 3469, pp. 1-76 : 23-24

Debilos labeculatum Scherrer , sp. nov.

( Figs 117, 136)

Description. Female. Fore wing 3.72 mm. Head: Antenna with 24 flagellomeres. Clypeus very sparsely punctate, markedly convex, most prominent ventrally, CWH 1.82; MWC 0.65, MLW 1.73, MWW 0.36; malar space long, MSM 1.36; supra-antennal area with almost indistinct, median, longitudinal carina; minimum distance from eye margin to occipital carina laterally distinctly longer than mandible base.

Mesosoma ( Fig. 117). Pronotum lateral portion next to collar sub-laterally inconspicuously strigate-rugose, next to mesopleuron inconspicuously corrugated, epomia indistinct; notaulus moderately impressed, inconspicuously, minutely corrugated, especially anteriorly, reaching about middle of mesoscutum; mesopleuron without distinct ridges or rugae, epicnemial carina restricted to ventral 0.6 of mesopleuron, posteriorly inconspicuously, densely corrugated; mesopleural groove moderately corrugated; sternaulus anterior half faintly corrugated; postpectal carina medially straight to slightly arched posteriorly; metapleuron, subapical fovea shallow, subcircular; pleural carina stout; propodeum anterior area moderately long, PLL 1.04, anterior transverse carina distinct, complete, slightly, uniformly curved, sometimes medially slightly pointed forwards, posterior area without distinct ridges or rugae, uniformly colliculate with anterior area, spiracle subrounded, SWL 1.00, propodeal apophyses of regular height, thorn-shaped, AHD 2.25. Legs: Hind t4 posterior lobe about 0.15 × 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 moderately curved; crossvein 1cu-a straight, arising distinctly apicad vein Rs&1M, by about 0.4 × 1cu-a length, angle with vein M+Cu distinctly obtuse; vein 2Cua about same size of crossvein 2cu-a, FWC 0.90; areolet moderately large, APH 1; vein 2Ma approximately as long as vein 2Mb, or a little shorter; vein 2Mb absent; crossvein 2m-cu with bulla short, about 0.2 × as long as vein length or shorter; vein 2Rsb sinuous. Hind wing vein 2-1A short but distinct, reaching about 0.5 × the distance to wing margin, HWC 2.43.

Metasoma ( Fig. 117). T1 finely coriarious, spiracle at about basal 0.6, prominent, T1LW 2.90, T1WW 2.42, T1GL 0.34; T2 moderately short, apically robust, T2T1L 0.69, thyridium subcircular, T2LW 0.79, T2WW 2.28. Ovipositor approximately straight, OST 0.44, dorsal valve with nodus absent, notch absent; ventral valve tip without distinct serrations.

Color. Head and mesosoma black, legs orangish brown (153, 104, 026), metasoma mostly dark brown (084, 063, 033). Head: Scape ventrally lightest; flagellomeres 5–10 dorsally white; mouth parts whitish (218, 216, 195), except mandible basal 0.5 and apex blackish. Mesosoma: Collar dorsally and propodeal apophyses white; propleuron ventro-lateral corner whitish lightest. Legs: Fore and mid coxae, mid trochanter, hind tibia basal 0.2, and t1 apical half and t2 basal half white, except fore coxa basal margin dorsally, mid coxa dorsal subcircular mark slightly and fore trochanter dorsally brown; trochantellus apical margin and ventrally, femora basal margin, fore femur ventrally, tibia anteriorly and ventrally, and tarsus, mid tibia basal 0.2 and posteriorly hind coxa apical margin lightest; mid trochanter, hind coxa, trochanter, trochantellus and tibia dorsally darkest. Fore wing with two large dark spots, taking cell 3M apical half up to cell 3R1 basal portion, and cell 1Cu apical parts, and respective surrounding areas. Metasoma: T1 ventrally and thyridium distinctly, and T3–8 slightly lightest; T1 apical 0.2 and T2 apical 0.3 with white stripe, T2 stripe anteriorly concave, concavity apex reaching T2 apical margin; T6 apical margin, and T7 and T8 dorsally white; ovipositor sheath dark brown, except basal 0.6 ventrally whitish; ovipositor light brown (187, 144, 084).

Male. Unknown.

Variability. Hind wing vein 2-1A sometimes longer than 0.5 of the distance to wing margin; propodeum posterior area apical half sometimes with faint, sparsely transverse ridges. Color: Extension and form of brown mark on mid coxa highly variable, from absent to largest and irregular, taking almost entirely antero-dorsal portion; extension and brightness of lightest marks on legs variable.

Comments. Included in the D. trochanteratum species group (see item Species Delimitation). The examined females could be mistaken for D. trochanteratum because of their almost identical color patterns, but can be differentiated from those by having the antenna with 24 flagellomeres (vs. 26–28 flagellomeres), malar space long, MSM 1.36 (vs. moderately long, MSM 1.15), and mid coxa white, except dorsal subcircular mark slightly brownish (vs. entirely light brownish). Females of D. labeculatum also resemble females of D. petiolatum but can be recognized by having the mesopleuron without distinct ridges or rugae (vs. dorsal margin medially inconspicuously strigulate), propodeum anterior area moderately long, PLL 1.04 (vs. very long, PLL 1.30), fore wing vein 2Cua about same size of crossvein 2cu-a, FWC 0.90 (vs. moderately shorter than crossvein 2cu-a, FWC 0.77), hind t1 apical half and t2 basal half white (vs. t1 apically and t2–4 white), and T1 dorsally dark brown, as darker as T2 (vs. orangish brown, lighter than T2). Debilos labeculatum can be readily differentiated from D. nivatum by the white marks at mesosoma. They have only dorsal portion of collar and apophyses white, whereas D. nivatum have collar entirely, subalar ridge, scutellum apical 0.6 and apophyses white.

Etymology. From the Latin word labecula, meaning “little stain,” in reference to the mid coxa with dorsal subcircular mark slightly brown in the holotype.

Distribution. Brazil. Apparently associated to Atlantic rainforest, recorded from several localities at Bahia close to its middle coast, such as Barra do Rocha, Buerarema, Ilhéus, Itacaré, and Ubaitaba (around 14°30’S 39°20’W), and Itororó (15°01’58”S 40°02’44”W) ( Fig. 136).

Material Examined. 8 ♀. Holotype ♀ from BRAZIL, Bahia, Itacaré, Fazenda Muchirão , 14°20’48”S 39°18’38”W, Malaise trap, 11.IV.2003, JCardoso & JMaia leg. ( CEPLAC) . In good shape, mounted on triangle point. Paratypes: BRAZIL: 1 ♀, from Bahia, Camamú, Faz. Nova Sorte , 19.XI.2002 ( CEPLAC) ; 1 ♀ same data except Barra do Rocha, Fazenda Iacina , 14°11’26”S 39°34’14”W, Malaise trap, 19.XI.2002, JCardoso & JMaia leg. ( CEPLAC) ; 1 ♀, same data except Ubaitaba, Fazenda Casa de Pedra , 14°18’81”S 39°19’47”W, 13.XII.2003 ( CEPLAC); 1 ♀, same data except Ilhéus, Fazenda São José, 14°42’69”S 39°11’33”W, 09.XII.2003 ( CEPLAC) ; 1 ♀, same data except Buerarema, Fazenda Sempre Viva , 14°56’S 39°18’W, 25.VIII.2002 ( CEPLAC) ; 1 ♀, same data except Itororó, Fazenda Santa Cruz , 15°01’58”S 40°02’44”W, 24.XI.2002 ( CEPLAC) ; 1 ♀, same data except 15.XII.2003 ( CEPLAC) .