Figures 1-3 from: Müller A, Praz C, Dorchin A (2018) Biology of Palaearctic Wainia bees of the subgenus Caposmia including a short review on snail shell nesting in osmiine bees (Hymenoptera, Megachilidae). Journal of Hymenoptera Research 65: 61-89. https://doi.org/10.3897/jhr.65.27704

Figures 1-3 Wainiasexsignata. 1 Nesting habitat 2.75 km southwest of Ifrane Atlas-Saghir in southern Morocco (photo V. Mauss) 2 Nest in a shell of Sphincterochila spec. closed with a plug built from chewed leaves 3 Opened nest with three linearly arranged brood cells each containing a prepupa.