Idiasta iaiaorum Peris-Felipo

Peris-Felipo, Francisco Javier & Belokobylskij, Sergey A., 2016, New South African species of the genus Idiasta Foerster, 1863 (Hymenoptera: Braconidae: Alysiinae), with a key to the Afrotropical and Malagasy taxa, Zootaxa 4150 (5), pp. 566-570 : 567-569

Idiasta iaiaorum Peris-Felipo , sp. nov.

( Figs 1 , 2 )

Etymology. Named in honour Mª Amparo Orts (Valencian “iaia” meaning "grandmother") and Vicente Felipo (Valencian “iaio” meaning "grandfather") for their valuable help to the first author.

Description. Female. Head. In dorsal view, 1.7 × as wide as median length, 1.5 × as wide as mesoscutum, smooth, with temple rounded behind eyes, eyes broader than temples. Eye in lateral view about as high as wide and 2.7 × as wide as temple medially. POL 1.1 × OD; OOL 3.4 × OD. Face 1.5 × as wide as high, with sparse setae; inner margins of eyes subparallel. Clypeus 2.1 × as wide as high, slightly curved ventrally. Paraclypeal fovea short, not crossing half distance between clypeus and eye. Mandible 3-dentate, widened towards apex, 1.6 × as long as its maximum width. All teeth wide; upper tooth slightly longer than lower tooth; middle tooth rather short, slightly longer than upper tooth, distinctly pointed towards apex; lower tooth subrounded. Antenna 34-segmented, about twice as long as body. Scape 1.7 × as long as pedicel. First flagellomere 3.0 × as long as its apical width. Second flagellomere 10.5 × as long as maximum width, 2.2 × as long as first flagellomere. Third flagellomere 8.6 × first flagellomere, penultimate 3.0 ×, and apical segment 3.7 × as long as their width accordingly.

Mesosoma. In lateral view, 1.5 × as long as high. Mesoscutum (dorsal view) 0.9 × its maximum width, smooth. Notauli present on horizontal surface of mesoscutum reaching mesoscutal pit. Mesoscutal pit short and oval. Prescutellar depression subquadrate, smooth, median carina present, lateral carina absent. Precoxal sulcus present, wide, crenulate, reaching anterior and posterior margins of mesopleuron. Posterior mesopleural furrow crenulate below. Propodeum almost completely rugose-reticulate, with distinct and almost complete curved median longitudinal carina. Propodeal spiracles relatively small.

Wings. Length of fore wing 3.3 × its maximum width. Marginal cell ending at apex of wing, 4.3 × as long as its maximum width. Vein 2-SR 1.4 × as long as vein 3-SR; vein SR1 5.7 × as long as vein 3-SR. Vein m-cu antefurcal. Vein cu-a strongly postfurcal. Subdiscal cell closed distally, 4.0 × as long as its maximum width. Vein CU1a arising from middle of distal margin of subdiscal cell. Hind wing 5.2 × as long as its maximum width.

Legs. Hind femur 6.2 × as long as its maximum width. Hind tibia weakly widened towards apex, 9.5 × as long as its maximum subapical width, 0.9 × as long as hind tarsus. First segment of hind tarsus 1.4 × as long as second segment.

Metasoma. First tergite weakly widened towards apex, twice as long as its apical width, striate. Ovipositor 4.5 × as long as first tergite, 1.2 × as long as metasoma, 2.5 × as long as hind femur, 0.5 × as long as fore wing.

Colour. Head, mesosoma and mandible dark brown. Propleuron, legs and metasoma brown. Scape, pedicel and ovipositor yellow. Flagellomeres mainly brown but 22nd to 28th flagellomeres white. Wings distinctly evenly darkened; pterostigma brown.

Length. Body 2.7 mm; fore wing 2.7 mm; hind wing 2.0 mm.

Variation. Body 2.5–2.8 mm; fore wing 2.5–2.8 mm; hind wing 1.8–2.0 mm. Eye in lateral view 2.3–2.7 × as wide as temple medially. Antenna 33–34-segmented. Second flagellomere 10.0–11.0 × as long as its maximum width. Mandible 1.5–1.6 × as long as its maximum width. Marginal cell 4.2–4.3 × as long as its maximum width. Vein SR1 5.5–5.7 × as long as vein 3-SR. Vein 2-SR 1.35–1.45 × as long as vein 3-SR. Hind femur 6.0–6.2 × as long as its maximum width. First metasomal tergite 2.0–2.2 × as long as its apical width. Ovipositor 4.4–4.5 × as long as first tergite, 1.1–1.2 × as long as metasoma, 2.3–2.5 × as long as hind femur.

Male. Body length 2.5–2.6 mm; fore wing 2.6–2.7 mm; hind wing 1.6–1.7 mm. Antenna 35–36-segmented. Second flagellomere 2.3 × as long as first. Vein SR1 5.0–5.1 × as long as vein 3-SR. Flagellomeres mainly brown, but 25th to 29th flagellomeres white. Otherwise similar to female.

Type material. Holotype: female, South Africa ( RSA) , KwaZulu-Natal Province, 35 km N Port Edward , 30º45’S 30º09’E, 450 m, 28.xii.2009 (leg. J. Halada) ( OLML) . Paratypes: 18 females, 31 males, same label as in holotype (OLML, ZISP).

Comparative diagnosis. This new species is similar to the Afrotropical Idiasta curtimembrum Fischer, 2004 , but differs from it in having the eye in lateral view 2.3–2.7 × as wide as temple medially (1.5 × in I. curtimembrum ), vein SR1 4.8 × as long as vein 3-SR (4.3 × in I. curtimembrum ), and dark antenna with several white flagellomeres in its apical half (without pale flagellomeres in apical half in I. curtimembrum ).

According to the key by Fischer (2008), this new species is similar to the Palaearctic Idiasta pallida Papp, 1994 . However, I. iaiaorum sp. nov. differs from I. pallida in having the hind femur 6.0–6.2 × as long as its maximum width (5.0–5.4 × in I. pallida ), the first metasomal tergite 2.0–2.2 × as long as its apical width (1.5–1.7 × in I. pallida ), vein 2-SR about 1.4 × as long as vein 3-SR (almost equal in I. pallida ), and both sexes with several whitish flagellomeres (only females with several whitish flagellomeres in I. pallida ).

Figures

FIGURE 1. Idiasta iaiaorum sp. nov. (A, C – F female, holotype; B male, paratype) A, B. Habitus, lateral view. C. Mandible. D. Antenna. E. Basal segments of antenna. F. Head, front view.

FIGURE 2. Idiasta iaiaorum sp. nov. (female, holotype) A. Head, dorsal view. B. Head and mesosoma, lateral view. C. Mesonotum, dorsal view. D. Propodeum and first metasomal tergite, dorsal view. E. Hind leg, metasoma and ovipositor. F. Fore and hind wings.