Alvania dianiensis n.sp., a benthic species from the isle of Giannutri (Tyrrhenian Sea, Italy), is described. It is compared to the closely related A. parvula, A. vermaasi, A. sororcula, A. dictyophora-complex and A. hallgassi. It is supposed that the new species has an algae-related habitat and a non-planktotrophic larval development.