Reference

Anselm Kratochwil, Angelika Schwabe (2020): Flower-visiting behaviour and habitats of the taxa of the Andrena wollastoni group (Hymenoptera, Anthophila, Micrandrena) on the Canary Islands compared to the Madeira Archipelago – Linzer biologische Beiträge – 0052_1: 309 - 326.