†family Thersiteidae Savornin 1914 (snail)
Parent taxon: Stromboidea according to P. Bouchet et al. 2005
Sister taxa: Aporrhaidae, Colombellinidae, Pugnellidae, Seraphsidae, Strombidae, Struthiolariidae, Tylostomatidae
Subtaxa: none
Ecology: epifaunal grazer