Order Ptenoglossa Gray 1853 (snail)
Parent taxon: Prosobranchia according to L. W. Ward and B.W. Blackwelder 1987
Sister taxa: Archaeogastropoda, Caenogastropoda, Entomotaeniata
Subtaxa: Brevizygia, Epitonioidea, Erratopleura, Gymnoglossa, Pommerozygia, Protoculidae
Ecology: epifaunal carnivore