†suborder Gymnosomata Blainville 1824 (snail)
Parent taxon: Pteropoda according to P. Bouchet et al. 2017
See also Beesley 1998
Sister taxa: Cliidae, Euthecosomata, Pseudothecosomata
Subtaxa: Clionidae Cliopsidae Notobranchaeidae Pneumodermatidae
Ecology: epifaunal
Distribution: