Xanthomicrogaster otamendi Martínez, 2018

Martínez, Juan José & Riverón, Alejandro Zaldívar, 2018, Two new species of Xanthomicrogaster (Hymenoptera: Braconidae) from Argentina, with a key to species of the genus, Zootaxa 4370 (3), pp. 295-300 : 296

Xanthomicrogaster otamendi Martínez sp. nov. ( Figs 1–6 )

Body length (excluding ovipositor and sheaths) 3.1 mm ( Fig. 1 ). Fore wing length 3.4 mm. Colour. General body colour yellow, with outer surface of scape and pedicel, flagellum, ovipositor sheaths and median area of hypopygium dark brown to black; also this species is characterized by a distinct dark brown spot covering most of the scutellar disc; wings hyaline, veins brown, pterostigma brown marginally and turning lighter towards the center. Head. Face ( Fig. 2 ) wider than high almost smooth and shiny, only with scattered punctures at the base of each seta. Malar space slightly shorter than width of mandible base, with distinct malar suture. Vertex smooth, except for hair punctures, ocelli forming an obtuse angle, OD 0.7 × POL and 0.5 × OOL. First flagellomere 3 × longer than apically wide and as long as second, two × longer than 14th flagellomere. Mesosoma 1.3 × longer than wide and 1.3 × longer than high. Pronotum smooth, pronotal furrow shallow and smooth. Mesoscutum ( Fig. 3 ) punctate, smooth and shiny in between punctures. Scutoscutellar scrobe formed by 9–10 sometimes partially confluent pits. Scutellum triangular, largely smooth, except for hair punctures which are distinctly less impressed than those of the mesoscutum. Propodeum largely smooth, with a distinct median longitudinal carina. Hind tibiae on outer surface with scattered spines. Hind femur 3.8 × longer than its maximum width, 0.8 × the length of hind tibia and 1.6 × longer than hind basitarsus. Wings ( Figs 5–6 ). Fore wing with pterostigma 2.5–2.6 × longer than wide. Vein R 1,4 × the length of pterostigma, and 2.8 × longer than r. Metasoma. Tergite I 0.8–0.9 × as long as broad, with a distinct median furrow, coarsely sculptured, punctuate to rugose areolate. Second tergite rectangular, parallel sided, rugose ( Fig. 4 ), with anterior and posterior margins distinctly scrobiculate, third tergite largely smooth and shiny third except for some scattered shallow punctures. Remaining tergites smooth and shiny. Ovipositor sheaths about 0.7 × as long as metasoma and 0.8 × as long as hind tibia.

Male: Unknown.

Etymology: The species name refers to the type locality.

Material examined: Holotype female, Argentina, Buenos Aires province, Reserva Natural Otamendi , 16.xii.2006, Martínez col. Paratype: One female, same data as holotype.

Figures

FIGURES 1–6. Xanthomicrogaster otamendi sp. nov. 1, habitus of female in lateral view; 2, head in anterior view; 3, head and mesosoma in dorsalview;4, metasoma in dorsal view; 5, forewing; 6, hind wing.Figures 1–4, holotype; 5–6, paratype.