In Tasmania, this superfamily (or taxon of roughly equivalent rank) includes 32 species in 16 genera in the following families (-sufamilies):
Batillariidae (mud-creepers) (figures a-d)
Cerithiidae – Bittiinae (creepers) (e.g. figure e)
Cerithiidae – Cerithiinae (creepers)
Dialidae (dialas) (e.g. figure f)
Litiopidae (alabas) (e.g. figure g)
Planaxidae – Fossarinae (larinopses)
Planaxidae – Planaxinae (clusterwinks)
Siliquariidae – Siliquariinae (spiralling worm-shells) (figures h-k)
Siliquariidae – Stephopomatinae (spiralling worm-shells) (figures l-m)
Turritellidae – Turritellinae (screw-shells) (e.g. figures n-q)