Acutostrea idriaensis (FOSSIL) (W.M. Gabb, 1869 †) USA, Washington
Acutostrea miguelensis (FOSSIL) (L.G. Hertlein, 1928 †) USA, California
Helvetostrea sequana (FOSSIL) (Thurmann & Étallon,1862 †) Switzerland
Praeexogyra dubiensis (FOSSIL) (Contejean, 1859 †) Kenya, Mandera, Lafey
Praeexogyra monsbeliardensis (FOSSIL) (Contejean, 1859 †) Switzerland