Antrusa chrysogastra (Tobias, 1986)

Peris-Felipo, Francisco Javier, Ameri, Ali, Talebi, Ali Asghar & Belokobylskij, Sergey A., 2015, Review of the genus Aristelix Nixon, 1943 (Hymenoptera, Braconidae, Alysiinae), with description of a new species from Iran and clarification of the status of Antrusachrysogastra (Tobias, 1986), Journal of Hymenoptera Research 45, pp. 97-111: 104-107

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Antrusa chrysogastra (Tobias, 1986)

comb. n.

Taxon classification Animalia Hymenoptera Braconidae

Antrusa chrysogastra (Tobias, 1986)   comb. n. Figs 6, 7

Exotela (Antrusa) chrysogastra   Tobias 1986: 351.

Antrusa chrysogastra   : Perepechaenko 2000: 75; Tormos et al. 2009: 258.

Aristelix chrysogastra   : Fischer 1999: 17; Yu et al. 2012.

Material examined.

Holotype (ZISP; examined): male, Moldova (Moldavia) "Tatareshty [47°12'15.8"N, 28°32'19.0"E], ostepn[yonnyi] lug v lesu [= steppe meadow in the forest], Tobias [collector],[1]967"; "Holotypus Exotela (Antrusa) chrysogastra   Tobias".


Male. Body length 2.5 mm; fore wing length 2.85 mm.

Head in dorsal view twice as wide as median length, 1.3 times as wide as mesoscutum, vertex entirely smooth, with scattered setae. Eye in lateral view 1.5 times as high as wide and 1.2 times as wide as temple medially. POL 1.85 times OD; OOL 3.0 times OD. Face punctate, with middle carina in upper half, with scattered long setae, twice as wide as high; inner margins of eyes subparallel. Clypeus slightly curved ventrally, 2.9 times as wide as high. Mandible 3-dentate, widened towards apex, 1.25 times as long as maximum width. Upper tooth of mandible longer than lower tooth, rounded apically; middle tooth long, wide basally and narrowed towards apex, rounded apically; lower tooth pointed apically.

Antenna longer than body, 29-segmented. Scape about 1.7 times as long as pedicel. First flagellar segment 2.6 times as long as its apical width, 1.25 times as long as first segment; second segment 2.15 times as long as its maximum width. Penultimate segments 1.3 times as long as wide; apical segment 2.3 times as long as maximum width.

Mesosoma 1.25 times as long as high (lateral view). Mesoscutum as long as its maximum width, with numerous setae on its middle surface and scattered setae on lateral areas. Notauli shallow on horizontal surface of mesoscutum. Mesoscutal midpit present, distinctly elongate. Prescutellar depression smooth, with median and lateral carinae. Precoxal suture present, wide, rugose, reached anterior margin of mesopleuron and not reaching its posterior margin. Mesepimeral sulcus crenulate below. Lower part of mesopleuron and metapleuron with long whitish setae. Propodeum completely rugose-reticulate. Propodeal spiracle relatively small.

Wings. Length of fore wing 3.0 times its maximum width. Marginal cell short, ending before apex of wing, 3.5 times as long as its maximum width. Vein r arising distinctly before middle of pterostigma. Second submarginal cell closed, 2.2 times as long as its maximum width. Hind wing 5.0 times as long as maximum width.

Legs. Hind femur 4.0 times as long as maximum width. Hind tibia weakly widened towards apex, 10.0 times as long as its maximum subapical width, 1.25 times as long as hind tarsus. First segment of hind tarsus (basitarsus) 1.7 times as long as second segment.

Metasoma distinctly compressed. First tergite entirely striate, with scattered setae, weakly widened towards apex, 1.5 times as long as apical width. Second tergite striate in apical half and here with scattered setae, 0.4 times as long medially as basal its width. Fourth to sixth tergites each with single row of setae in apical half.

Colour. Head, antennal segments, mesosoma, first and second tergite black. Scape, pedicel and most part of metasoma yellowish brown, first and second metasomal tergites black. Legs yellow. Wings hyaline. Pterostigma brown.

Female. Unknown.

Comparative diagnosis.

According to Tobias’ key ( 1986), Antrusa chrysogastra   (Tobias) differs from A. chrysotegula   (Tobias, 1986) in having the first metasomal tergite rugose-punctate (longitudinally striate in A. chrysotegula   ), hind femur 4.5 times as long as its maximum width (5.5 times in A. chrysotegula   ), mesonotum almost entirely with short semi-erecte setae (only anteriorly pubescent in A. chrysotegula   ), and metasoma yellow in the apical half (dark to black in apical half in A. chrysotegula   ).




The main characters of Antrusa   Förster are vein 2-M usually merging with the submarginal cell; m-cu antefurcal; mandibles widened apically and with only three teeth; first metasomal tergite with a median longitudinal keel; metasoma and head without granulate sculpture; second metasomal tergite usually smooth; apical metasomal tergites each with a single transverse line of setae; and no sexual dimorphism in the pterostigma ( Tobias 1986, van Achterberg 1993, Perepechaenko 2000, Tormos et al. 2009, Pardo 2010). According to characters listed here, A. chrysogastra   (Tobias) undoubtedly belongs to the genus Antrusa   , but not to Aristelix   .