†suborder Gymnoglossa (snail)
Parent taxon: Ptenoglossa according to L. W. Ward and B.W. Blackwelder 1987
See also Martin 1904
Sister taxa: Brevizygia, Costasphaera, Erratopleura, Pommerozygia, Protoculidae
Subtaxa: Crepidulacea Muricacea Volutacea
Ecology: epifaunal carnivore