In Tasmania, this order (or taxon of roughly equivalent rank) includes 270 species in 122 genera in 49 families (- subfamilies) in the following superfamilies (or taxa of roughly equivalent rank):
Capuloidea (cap-shells)
Calyptraeoidea (shelf-limpets) (e.g. figures a-b)
Cingulopsoidea (eaton-shells)
Cypraeoidea (cowries) (e.g. figures c-d)
Epitonioidea (wentletraps) (e.g. figures e-f)
Eulimoidea (urchin-snails) (e.g. figure g)
Littorinoidea (winkles) (e.g. figures h-i)
Naticoidea (sand-snails) (e.g. figures j-k)
Pterotracheoidea (sea-elephants)
Rissooidea (rice-shells) (e.g. figures l-m)
Tonnoidea (rock-whelks) (e.g. figures n-q)
Triphoroidea (sinistral-creepers) (e.g. figures r-s)
Vanikoroidea (bonnet-limpets) (e.g. figures t-u)
Velutinoidea (false-cowries) (e.g. figures v-x)
Vermetoidea (haphazard worm-shells) (e.g. figure y)
Xenophoroidea (carrier-shells)