Fischer, 1883
Diagnosis
Shell not coiled, primitive forms with straight tubular shells, more highly evolved ones with pyramidal shells or shells composed of two valve-like halves; soft parts show secondary bilateral symmetry; columellar muscle is attached to inner surface of protoconch.
Subfamilies treated:
Subfamily Cavoliniinae van der Spoel, 1972
Subfamily Clioinae van der Spoel, 1972
Subfamily Cuvierininae van der Spoel, 1972
[Table Cavoliniidae]