Agnomyax R. B. Stewart, 1930 (original description)
Bathytormus R. B. Stewart, 1930 (original description)
Calorhadia R. B. Stewart, 1930 † (original description)
Calorhadia (Litorhadia) R. B. Stewart, 1930 † accepted as Litorhadia R. B. Stewart, 1930 † (original description)
Cardium (Eucardium) P. Fischer, 1887 accepted as Acanthocardia J. E. Gray, 1851 (subsequent type designation)
Claibornites R. B. Stewart, 1930 † (original description)
Claibornites (Codalucina) R. B. Stewart, 1930 † represented as Claibornites R. B. Stewart, 1930 † (original description)
Claibornites (Saxolucina) R. B. Stewart, 1930 † accepted as Saxolucina R. B. Stewart, 1930 † (original description)
Cucullaeinae R. B. Stewart, 1930 accepted as Cucullaeidae R. B. Stewart, 1930 (original description)
Eophysema R. B. Stewart, 1930 † (original description)
Eucrassatella (Hybolophus) R. B. Stewart, 1930 accepted as Hybolophus R. B. Stewart, 1930 (original description)
Fraginae R. B. Stewart, 1930 (original description)
Glyptoactis R. B. Stewart, 1930 † (original description)
Loripinus (Eophysema) R. B. Stewart, 1930 accepted as Eophysema R. B. Stewart, 1930 † (original description)
Loripinus (Pegophysema) R. B. Stewart, 1930 accepted as Pegophysema R. B. Stewart, 1930 (original description)
Lucina Bruguière, 1797 (additional source)
Lucina (Quasilucina) R. B. Stewart, 1930 † accepted as Lucina Bruguière, 1797 (original description)
Microcallista R. B. Stewart, 1930 † accepted as Callista (Microcallista) R. B. Stewart, 1930 † represented as Callista Poli, 1791 (original description)
Microcallista conradiana (Gabb, 1864) † (basis of record)
Miltha (Plastomiltha) R. B. Stewart, 1930 † accepted as Plastomiltha R. B. Stewart, 1930 † (original description)
Neithea (Neitheops) R. B. Stewart, 1930 † represented as Neithea Drouët, 1825 † (original description)
Noetiidae R. B. Stewart, 1930 (original description)
Noetiinae R. B. Stewart, 1930 accepted as Noetiidae R. B. Stewart, 1930 (original description)
Palliolum (Delectopecten) R. B. Stewart, 1930 † accepted as Delectopecten R. B. Stewart, 1930 (original description)
Parallelodon (Nanonavis) R. B. Stewart, 1930 † (original description)
Pitarinae R. B. Stewart, 1930 accepted as Callocardiinae Dall, 1895 (original description)
Plagiocardium (Schedocardia) R. B. Stewart, 1930 † accepted as Schedocardia R. B. Stewart, 1930 † (original description)
Portlandia (Portlandella) R. B. Stewart, 1930 † accepted as Portlandia Mörch, 1857 (original description)
Solen (Eosolen) R. B. Stewart, 1930 † accepted as Solena (Eosolen) R. B. Stewart, 1930 † represented as Solena Mörch, 1853 (original description)
Stereomactra Stewart, 1930 † (original description)
Trachycardiinae R. B. Stewart, 1930 (original description)
Trachycardium (Agnocardia) R. B. Stewart, 1930 † accepted as Agnocardia R. B. Stewart, 1930 † (original description)
Trachycardium (Dallocardia) R. B. Stewart, 1930 accepted as Dallocardia R. B. Stewart, 1930 (original description)
Trachycardium (Mexicardia) R. B. Stewart, 1930 accepted as Mexicardia R. B. Stewart, 1930 (original description)
Trachycardium (Phlogocardia) R. B. Stewart, 1930 accepted as Phlogocardia R. B. Stewart, 1930 (original description)
Trapezium Megerle von Mühlfeld, 1811 (subsequent type designation)
Trapezium (Schedotrapezium) carinatum Gabb, 1864 † (new combination reference)
Trigonia evansana var. oregona [sic] † accepted as Notoscabrotrigonia oregana (E. L. Packard, 1921) † (basis of record)
Trigoniocardia (Americardia) R. B. Stewart, 1930 accepted as Americardia R. B. Stewart, 1930 (original description)
Turnus plenus Gabb, 1864 † (additional source)
Venerella (Compsomyax) R. B. Stewart, 1930 † accepted as Compsomyax R. B. Stewart, 1930 (original description)
Venericardia (Venericor) R. B. Stewart, 1930 † accepted as Venericor R. B. Stewart, 1930 † (original description)