Evolutionary diversification of the genus Theba (Gastropoda: Helicidae) in space and time: A land snail conquering islands and continents

► Recognition of 18 genetically distinct clades including at least three new species. ► Initial radiation on the Canary Islands during the Late Oligocene/Early Miocene. ► Re-colonization of NW Africa with continental radiation during the Middle Miocene. ► Main mode of diversification: intra-archipelago and intra-continental speciation.