Osmia tergestensis, Ducke, 1897

Müller, Andreas, 2020, Palaearctic Osmia bees of the subgenera Hemiosmia, Tergosmia and Erythrosmia (Megachilidae, Osmiini): biology, taxonomy and key to species, Zootaxa 4778 (2), pp. 201-236 : 220

Osmia tergestensis species group

The members of this species group are characterized by their body length not exceeding 8.5 mm and the shape of male tergum 7, which is bifid bearing two short spines or two teeth of rectangular to triangular shape ( Fig. 22, 23 ).

Figures

FIGURES 15–23: Osmia (Tergosmia). 15: Female of O. tergestensis in front of her brood cell hidden in a rock fissure (photo A. Krebs). 16: Female of O. tergestensis folding petal after having it bitten off from flower of Geranium pyrenaicum (Geraniaceae; photo A. Krebs). 17: Brood cells of O. tergestensis between blades of dense grass tussock. 18: Brood cell of O. avosetta at the end of a short burrow in the ground (photo C. Sedivy). 19: Female of O. lunata depositing nectar in her brood cell built in a short burrow in the ground. 20–22: Male terga 6–7 of O. avosetta (20), O. lunata (21), O. rhodoensis (22) and O. tergestensis (23).