Debilos trochanteratum (Szépligeti), 1916

Scherrer, Marcus V. & Aguiar, Alexandre P., 2012, 3469, Zootaxa 3469, pp. 1-76 : 44-46

Debilos trochanteratum (Szépligeti), 1916

( Figs 12, 24, 30, 36, 58, 116, 122, 140)

Neomesostenus trochanteratus Szépligeti, 1916:304 . Description, distribution, keyed. Holotype ♂ ( Hungarian Natural History Museum , Budapest, Hungary - HNHM) probably lost.

Debilos trochanteratum Townes, 1970:258 , 536. Generic transfer, listed.

Debilos trochanteratum: Yu & Horstmann 1997:239 . Listed.

Debilos trochanteratum: Yu et al., 2005 . Listed.

Redescription. Female. Fore wing 3.64 mm. Head: Antenna with 26–28 flagellomeres. Clypeus very sparsely punctate, markedly convex, most prominent ventrally, CWH 1.63; MWC 0.53, MLW 2.00, MWW 0.50; malar space moderately long, MSM 1.15; supra-antennal area with almost indistinct, median, longitudinal carina; minimum distance from eye margin to occipital carina laterally distinctly longer than mandible base.

Mesosoma ( Figs 116). Pronotum lateral portion next to collar sub-laterally inconspicuously strigate-rugose, next to mesopleuron inconspicuously corrugated, epomia inconspicuous; 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 0.6 faintly corrugated; postpectal carina medially straight; metapleuron, subapical fovea shallow, subcircular; pleural carina stout; propodeum anterior area very long, PLL 1.12, 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 ( Fig. 12), spiracle subrounded, SWL 1.25 ( Fig. 58), propodeal apophyses of regular height, thorn-shaped, AHD 2.63. 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 0.91; areolet moderately large, APH 1.00; 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 slightly sinuous. Hind wing vein 2-1A moderately long, reaching about 0.6 × the distance to wing margin, HWC 1.89.

Metasoma ( Fig. 116). T1 finely coriarious, spiracle at about basal 0.6, prominent, T1LW 2.66, T1WW 2.56, T1GL 0.35; T2 moderately short, apically robust, T2T1L 0.69, thyridium subcircular, T2LW 0.94, T2WW 1.80. Ovipositor approximately straight, OST 0.43, 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 0.4–0.6 and apex blackish. Mesosoma: Collar dorsally and propodeal apophyses white; mesoscutum lateral lobes centrally brownish. Legs: Fore coxa and trochanter, and hind t1 apical half and t2 basal half to entirely white, except fore coxa anteriorly slightly and fore trochanter dorsally brownish; mid and hind trochanter apical margin dorsally, trochantellus apical margin, femora basal margin, fore and mid tibiae anteriorly and posteriorly, hind tibia basal 0.2 lightest; mid coxa light brownish; hind trochanter, trochantellus, femur towards apex and tibia dark brown. 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 apical 0.2 and T2 apical 0.3 with white stripe, T2 stripe anteriorly slightly concave; thyridium distinctly and T3 apical half T4–8 slightly lightest; T6 apical margin, T7 and T8 dorsally, and sternites medially white; ovipositor sheath dark brown, except basal 0.6 ventrally whitish; ovipositor light brown (187, 144, 084).

Male. Fig. 122. Antenna with 27 flagellomeres. General morphology and color similar to female, except for slightly smaller body size (fore wing about 4.26–4.82 mm); generally more pilose; flagellum without white band; propodeal apophyses absent, only vestigial and uniformly black with propodeum; fore wing without dark spots; legs generally lightest, yellowish brown; mid and hind tarsus and hind tibia entirely dark brown, without white marks; hind femur distinct darkish apically; fourth tarsomeres not bilobed; T1 more slender, with spiracle very conspicuously prominent; T2 without white stripe; T3 apical half and T4 basal half dark yellowish (189, 164, 034); T5–8 entirely brown, without lightest or white marks.

Variability. Mesopleuron sometimes with short, faint transverse ridges next to scrobe and centrally to dorsal margin. Color: Some females with flagellomeres 5–10 mostly or entirely white. Brightness and hue of brownish marks at mesoscutum lateral lobes highly variable, from faint or almost indistinct in most specimens to marked and distinct orangish brown, as in female from Peru. Mid coxa sometimes faintly brownish; extension and brightness of lightest marks on legs variable.

Comments. This species was originally described based on the male only. It is redescribed here based on the female, reported for the first time. Included in the D. trochanteratum species group (see item Species Delimitation). Females of D. trochanteratum are very similar to females of D. labeculatum because of their almost identical color patterns, but can be separated from those by having the antenna with 26–28 flagellomeres (vs. 24 flagellomeres), malar space moderately long, MSM 1.15 (vs. long, MSM 1.36), and mid coxa light brownish (vs. white, except dorsal subcircular mark slightly brownish). The examined females are also similar to females of D. petiolatum but can be isolated from those by having the fore wing vein 2Cua about same size of crossvein 2cu-a, FWC 0.91 (vs. moderately shorter than crossvein 2cu-a, FWC 0.77), hind t1 apical half and t2 basal half to entirely white (vs. t1 apically and t2–4 white), and T1 dark brown, as darker as T2 (vs. orangish brown, lighter than T2). However, females of D. trochanteratum can be readily differentiated from D. nivatum by the white marks at mesosoma. Debilos trochanteratum have only dorsal portion of collar and apophyses white, whereas D. nivatum have collar entirely, subalar ridge, scutellum apical 0.6 and apophyses white.

Males of D. trochanteratum differ from males of D. petiolatum by having the hind tarsus entirely dark brown (vs. hind t1 apically and t2–4 white), T2 without white stripe (vs. with apical white stripe), and T3 apical half and T4 basal half dark yellowish (vs. T3 and T4 entirely dark brown).

Distribution. The type locality is Mapiri, Bolivia. Thus, this work add the records from Brazil, on two localities of Rondônia: Candeias do Jamari (08°47’S 63°42’W) and Guajará-Mirim (10°34’25”S 64°05’20”W); Ecuador, on Sucumbios: Napo River, Sacha Lodge (0°30’S 78°30’W); and Peru, on Quincemil, nr. Marcapata (about 13°35’S 70°58’W) ( Fig. 140).

Material Examined. 4 ♀, 1 ♂. ECUADOR : 1 ♀ from Sucumbios, Napo River, Sacha Lodge , 0°30’S 78°30’W, 220–330 m, 12–22.VI.1995, Malaise, PHibbs leg. ( CNCI) . BRAZIL: 1 ♀ from Rondônia, Candeias do Jamari, Batalhão de Polícia Ambiental, BR 364, Km 2, 102m, 08°47’S 63°42’W, 28.I–4.II.2006, Malaise, DFMugrabi leg., Debilos sp. BFSantos det. 2008 ( UFES) ; 1 ♀, same data, except Guajará-Mirim, Parque Estadual , 10°34’25”S 64°05’20”W, 26–28.I.1998, Malaise, JRMSantos leg. ( UFES) . PERU: 1 ♀ from Quincemil, 750 m, nr. Marcapata , XI.1962, Luis Peña leg. ( AEIC) ; 1 ♂, same data except 20–30.X.1962, Debilos “ trochanteratus ,” Townes det. 1967 ( AIEC) .