†order Protremata Beecher 1891
Parent taxon: Molluscoidea according to P. E. Raymond 1911
See also Alikhova 1953, Phleger 1933 and Sutton 1938
Sister taxon: Atremata
Subtaxa: Clitambonacea Dalmanellacea
Parent taxon: Molluscoidea according to P. E. Raymond 1911
See also Alikhova 1953, Phleger 1933 and Sutton 1938
Sister taxon: Atremata
Subtaxa: Clitambonacea Dalmanellacea