Myrmilla calva (VILLIERS 1789)

G. F & Foucart, A., 2008, Description of a gynandromorphic Myrmilla calva (VILLIERS 1789), with a summary on gynandromorphism phenomenon within Mutillidae (Hymenoptera: Scolioidea), Linzer biologische Beiträge 40 (2), pp. 1873-1880 : 1874-1875

Myrmilla calva (VILLIERS 1789) (Figs 1-3)

M a t e r i a l e x a m i n e d: 1 specimen from Spain: Catalonia, Cambrils de Mar, 27.V.1990, H. Tussac leg. (coll. A. Foucart, Montpellier).

D e s c r i p t i o n. Length: 7.5 mm. General appearance female-like (Fig. 1). Head entirely and normally female-like, reddish-brown, lighter in middle, with scattered recumbent or semi erect brown setae, except on vertex, bearing shorter recumbent goldish setae; antennae 12-segmented; mandibles strongly enlarged toward apex, with one median tooth on inner margin and three apical teeth; maxillo-labial complex female-like, normally developed. Mesosoma entirely female-like, reddish-orange with sides darkened, without wings; dorsal sclerites completely fused; legs female-like, covered with erect or semi erect long setae; mid- and hind legs with 5 long and strong spines along laterodorsal margin. Metasoma blackish, with mixed male and female characters; shape, pubescence and sculpture of metasomal segments 1-5 female-like; segment 1 transverse, widely attached to following segment, bearing two well developed anterolateral lamellae; T1 with fine and dense punctures (distance between punctures 1.0 or less diameter of a puncture), mixed up with a few coarser punctures, bearing an apical band of whitish pubescence; metasomal segment 2 representing most part of metasoma (more than half length), from above, with weakly convex sides; T2 punctate-rugose, with coarse and dense punctures (distance between puncture less than 1.0 diameter of a puncture), except along apical margin, with fine and dense punctures, bearing moderately dense mixed-up whitish/blackish and recumbent/erect setae, and an apical band of whitish pubescence, wider in middle; S2 regularly convex, without median conical process; metasomal segments 4-5 with recumbent mostly whitish setae, resembling continuous bands; S1-5 bearing scattered setae and coarse and scattered punctures; metasomal segments 6-7 male-like, with tergites bearing very coarse and dense punctures and scattered recumbent setae; S7 bearing a normally developed median conical process. Genital male capsule fully and normally developed ( Figs 2-3 ).

Fig. 1: Myrmilla calva (VILLIERS 1789) , gynandromorph specimen, habitus.

Figures

Figs 2-3: Myrmilla calva (VILLIERS 1789), gynandromorph specimen, metasomal segments and genital capsule in dorsal (2) and ventral (3) view. T7 a little turned on the left; arrow indicates the conical median process on S7.