A new parasitoid (Hymenoptera: Braconidae: Aphidiinae) of the invasive bamboo aphids Takecallis spp. (Hemiptera: Aphididae) from Western Europe Author Rakhshani, Ehsan Author Pons, Xavier Author Lumbierres, Belén Author Havelka, Jan Author Pérez Hidalgo, Nicolás Author Tomanović, Željko Author Starý, Petr text Journal of Natural History 2017 J. Nat. Hist. 2017-06-05 51 21 - 22 1237 1248 http://dx.doi.org/10.1080/00222933.2017.1327622 journal article 5013 10.1080/00222933.2017.1327622 43c82c34-0141-4526-a534-9aff8a19ccb6 1464-5262 5181465 ED15BA16-E8A9-4CEA-BDA7-FBAB02FEB091 Trioxys remaudierei Starý & Rakhshani sp. nov. ( Figure 2 (a–h)) Diagnosis The new species is easily distinguishable from its congeners in having the ventral prongs of the abdomen fused over two-thirds of their length, then bifurcated toward the tip. The only morphologically similar species is Trioxys betulae (Marshall) , which exhibits a clearly different prong shape (and has a different host range: Symydobius Mordvilko and Clethrobius Mordvilko ). In Trioxys remaudierei sp. nov. , the prong is bifurcated on the apical one-third of its length ( Figure 3 (h)) and has two or three perpendicular dorsal setae, whereas the prong in Trioxys betulae is bifurcated over half its length ( Figure 4 (c)) and has a single perpendicular dorsal seta. Trioxys remaudierei sp. nov. has a petiole that is more elongate (2.00–2.10 times as long as wide at the spiracles – Figure 2 (g)) than in Trioxys betulae (1.6–1.7 times as long as wide at the spiracles – Figure 4 (d)). Flagellomere 1 has no longitudinal placode in Trioxys remaudierei sp. nov. ( Figure 2 (c)), whereas it has three or five longitudinal placodes in Trioxys betulae ( Figure 2 (b)). The fore wing marginal setae are uniformly long in Trioxys remaudierei sp. nov. ( Figure 2 (e)), whereas the marginal setae are medium-sized and elongate in the posterior part of the fore wing in Trioxys betulae ( Figure 4 (a)). Description of female Head. Eye large ( Figure 2 (a)), parallel-sided in lower part, only slightly converging toward the clypeus; inter-ocular line equal to 0.31–0.32 of head width; malar space equal to 0.10– 0.11 of longitudinal eye diameter. Face and malar space sparsely hairy. Clypeus narrow, with six to eight long setae. Tentorial index (tentorio-ocular line/intertentorial line) 0.25. Maxillary palp with four palpomeres, labial palp with two palpomeres ( Figure 2 (b)). Mandible bidentate, bearing a few long setae on the outer surface. Antennae ( Figure 2 (c)) 13-segmented, filiform, prevailingly with semi-erect setae that are sub-equal to or shorter than diameter of the segments; flagellar segment 1 (=F1) 4.60–4.65 times as long as its median width, and without longitudinal placodes; F2 4.12–4.13 times as long as its median width, with two or three longitudinal placodes; F1 equal to F2. Mesosoma. Mesonotum with notauli distinct anteriorly, with one or two rows of long setae on each side. Scutellum ( Figure 2 (d)) sub-triangular, with three long setae on each side, slightly crenulated posteriorly. Fore wing: stigma ( Figure 2 (e)) in the form of an elongated triangle with an almost straight anterior outline, 3.00–3.01 times as long as its width and 1.95–2.00 times as long as R1 vein; anterior part of r and RS vein extended downward, reaching end of R1 vein. Fore wing surface densely covered with mediumsize setae and with long marginal setae. Propodeum ( Figure 2 (f)) areolate, with large pentagonal central areola; antero-central carinae extending toward spiracles with several branches, a circular carina surrounding the spiracles on each side; postero-central carinae regular; upper part of propodeum with a row of three or four long setae on each side; lower part with one or two long setae below spiracles on each side. Figure 1. Arboretum of bamboo, Phyllostachys sp. , in Lleida (Spain). Figure 2. Trioxys remaudierei Starý & Rakhshani sp. nov. (a) Head, frontal view; (b) maxillary and labial palps; (c) antenna; (d) posterior part of mesonotum and scutellum in dorsal view; (e) fore wing; (f) propodeum; (g) metasomal terga I–IV; (h) genitalia, lateral aspect; (i) tip of prongs. Metasoma. Petiole ( Figure 2 (g)) short, 2.00–2.10 times as long as wide at the spiracles, with a pair of short setae on the postero-dorsal part, and two lateral setae below the slightly prominent spiracular tubercles; anterior part crenulated toward the center, slightly constricted between the spiracles, creating part of a shallow fovea. Ovipositor sheath ( Figure 2 (h)) elongate, 2.30–2.40 times as long as its maximal width (at base), with a single long seta and several short setae on the lateral and dorsal surfaces. Prongs ( Figure 2 (h,i)) straight and long, bifurcated on apical one-third, each having a single ovoid shape and two or three perpendicular dorsal setae, followed by a normal apical seta; the dorsal area between the bifurcation and tip bearing three long perpendicular setae, the fused part with four to six dorso-lateral setae. Colour Head brown, gena, face, clypeus, mouthparts yellow. Antenna light brown; scape, pedicel, F1 and F2 yellow. Mesonotum and propodeum brown, the rest of the mesosoma yellow. Legs yellow, apices of fore tarsi infuscate. Petiole and basal triangular spot on tergite 2 yellow, the rest of the metasoma brown. Ovipositor sheaths and prongs yellow to brown-yellow.