Figures 21-26 from: Prosi R, Wiesbauer H, Müller A (2016) Distribution, biology and habitat of the rare European osmiine bee species Osmia (Melanosmia) pilicornis (Hymenoptera, Megachilidae, Osmiini). Journal of Hymenoptera Research 52: 1-36. https://doi.org/10.3897/jhr.52.10441

Figures 21-26 - Female mandibles of three closely related Osmia (Melanosmia) species; left=mandible in front view, right=mandible from below: 21–22 Osmia pilicornis 23–24 Osmia inermis 25–26 Osmia parietina. Figures are not to scale.