†family Costasiellidae Clark 1984 (snail)
Gastropoda - Heterostropha - Costasiellidae
Parent taxon: Limapontioidea according to P. L. Beesley 1998
Sister taxa: Caliphyllidae, Hermaeidae, Limapontiidae
Subtaxa: none
Ecology: epifaunal
Distribution: there are no occurrences of Costasiellidae in the database