The status and relationships of Vitrina polloneriana Fra Piero, 1897, with description of Sardovitrina n. gen. (Gastropoda: Pulmonata: Vitrinidae)

Vitrina polloneriana Fra' Piero, 1897, is revised and assigned to the new monospecific genus: Sardovitrina. The new genus belongs to the plutonmine vitrimids (vitrinids with glandula amatoria) and is close to Oligolimax Fischer in Paulucci, 1878 (Oligolimax and Sardovitrina share a penial retractor passing above the right ommatophore retractor). However, all species included in Oligolimax are distinct from Sardovitrina by the fact that they can withdraw their body entirely into the shell, and by virtue of small shell lobes and completely different internal structures of the penial complex.