Onestia crespinae (FOSSIL) Day 1978 †
Onestia onestae (FOSSIL) (McLearn, 1931 †) Canada, Alberta, Division No. 14
Pachycardium stantoni (FOSSIL) (B. Wade, 1926 †) Tennessee100 mm
Perucardia brueggeni (FOSSIL) (Olsson 1944) †
Protocardia alcesiana (FOSSIL) McLearn, 1933 † Canada, Alberta, Division No. 14
Protocardia bombax (FOSSIL) Tate, 1875 † UK, England
Protocardia buckmani (FOSSIL) Morris & J. Lycett,1853 † UK, England, Gloucestershire
Protocardia contusa (FOSSIL) Healey 1908 †
Protocardia costaricensis (FOSSIL) A.A. Olsson, 1922 † Costa Rica, Limón, Talamanca
Protocardia dufrenoyca (FOSSIL) Buvignier, 1852 † Mexico, Chiapas, Ocozocoautla de Espinosa
Protocardia eduliformis (FOSSIL) (F.A. Roemer, 1836 †) Ethiopia, Marajum Valley
Protocardia hepingxiangensis (FOSSIL) J. Chen † China, Qinghai
Protocardia hillana (FOSSIL) (J. de C. Sowerby,1813 †) Egypt, Sinai Peninsula
Protocardia koshikijimensis (FOSSIL) K. Amano, 1958 † Japan, Amakusa-Shimoshima
Protocardia lingulata (FOSSIL) J. Lycett, 1863 † France, Picardie, Aisne
Protocardia luggudensis (FOSSIL) Troedsson, 1951 † Mexico, Sonora, Caborca
Protocardia lycetti (FOSSIL) (Rollier †) China, Qinghai
Protocardia newberryana (FOSSIL) W.M. Gabb, 1881 †
Protocardia parahillana (FOSSIL) B. Wade, 1926 † Tennessee, McNairy County
Protocardia peregrinorsa (FOSSIL) (A.V.M.D. D'Orbigny,1842 †) Egypt, Bir Lagama
Protocardia pesolina (FOSSIL) Contejean, 1859 † Mexico, Chiapas, Ocozocoautla de Espinosa
Protocardia philippiana (FOSSIL) R.W. Dunker, 1847 † China, Guangdong, Jiangmen
Protocardia piettei (FOSSIL) Fischer, 1969 † France, Picardie, Aisne
Protocardia praecalva (FOSSIL) Dubar, 1948 †
Protocardia purbeckense (FOSSIL) (De Loriol, 1865 †) UK, Dorset
Protocardia qinghaiensis (FOSSIL) Wen, 1979 † China, Germu County
Protocardia razavii (FOSSIL) Repin, 2013 † Iran, Razavi Khorasan, Ferdows
Protocardia regulare (FOSSIL) (Coquand, 1862 †) Egypt, Sinai Peninsula
Protocardia rhaetica (FOSSIL) M.S. Merian, 1853 † UK, Wales, Cardiff
Protocardia somaliensis (FOSSIL) Cox, 1935 † Saudi Arabia
Protocardia sphaeroidea (FOSSIL) (E. Forbes, 1845 †) UK, Isle of Wight
Protocardia striatula (FOSSIL) (Sowerby, 1829 †) Chile, Región Metropolitana de Santiago
Protocardia stricklandi (FOSSIL) Morris & J. Lycett,1853 † China, Tanggula Mountains
Protocardia subquadrata (FOSSIL) J. Evans & Shumard,1857 † Canada, Alberta, Division No. 1
Protocardia truncata (FOSSIL) (Sowerby, 1827 †) Mexico, Sonora, Caborca