Contributions to the nomenclature and phylogeny of Boettgeria O. Boettger, 1863, with description of Loosjesiella n. subgen. (Gastropoda: Pulmonata: Clausiliidae)

The species of the clausiliid genus Boettgeria O. Boettger, 1863, are re-evaluated and a hypothesis concerning their evolution and radiation on the Madeira Archipelago is forwarded. As a result, the genus is subdivided in two subgenera, one of which is herein described ( Loosjesiella n. subgen.). A cladogram summarizing the hypothetical evolution of the group is presented. The geological background and the mutual implications are discussed.