Chelostoma rapunculi

Müller, Andreas, 2015, Palaearctic Chelostoma bees of the subgenus Gyrodromella (Megachilidae, Osmiini): biology, taxonomy and key to species, Zootaxa 3936 (3), pp. 408-420 : 409

rapunculi species group

Preoccipital ridge raised to a carina. Basal zone of propodeum distinctly sloping and usually only about half as long as metanotum. Anterior surface of tergum 1 shallowly concave. Females: Clypeus only slightly protruding or with flat narrow apical zone ( Fig. 5 ). Males: Median elevation on sternum 2 of uniform shape among species, roughly triangular in lateral view, its posterior surface evenly sloping, of half-elliptical shape and almost flat ( Fig. 12 ). Apical zone of sternum 4 without dense pilosity of yellowish hairs. Tergum 7 tripartite with one lower median tooth and two upper lateral teeth ( Fig. 6, 9 ), which are rarely fused to a straight uninterrupted transverse apical margin.

Figures

FIGURE 5 – 10. 5: Chelostoma clypeale, head of female. 6: Chelostoma clypeale: terga 4 – 7 of male. 7: Chelostoma clypeale, sterna 2 – 4 of male. 8: Chelostoma tonsum, head of male. 9: Chelostoma tonsum, terga 4 – 7 of male. 10: Chelostoma tonsum, sterna 2 – 3 of male.

FIGURE 11 – 19. 11: Chelostoma orientale, head of female. 12: Chelostoma orientale, sternum 2 of male. 13: Chelostoma orientale, sterna 3 – 6 of male. 14: Chelostoma handlirschi, head of female. 15: Chelostoma handlirschi, sternum 2 of male. 16: Chelostoma aegaeicum, sternum 2 of male. 17: Chelostoma nasutum, head of female. 18: Chelostoma nasutum, sternum 2 of male. 19: Chelostoma hebraeum, sternum 2 of male.