Classification of the genus Protocardia

G. †Protocardia Beyrich 1845
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Subg. †Protocardia (Leptocardia) Meek 1876
Subg. †Protocardia (Pachycardium) Conrad 1869
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Pachycardium coronaensis Packard 1922
Subg. †Protocardia (Tamilicardia) Chiplonkar and Tapaswi 1976
Protocardia alcesiana McLearn 1933
Protocardia buckmani Morris and Lycett 1853
Protocardia dufrenoyca Buvignier 1852
Protocardia eduliformis Roemer 1836
Protocardia gambrina Gabb 1861
Protocardia hillana Sowerby 1813
Protocardia lingulata Lycett 1863
Protocardia luggudensis Troedsson 1951
Protocardia peregrinorsa d'Orbigny 1842
Protocardia pesolina Contejean 1859
Protocardia philippiana Dunker 1847
Protocardia piettei Fischer 1969
Protocardia razavii Repin 2013
Protocardia rhaetica Merian 1853
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Invalid names: Protocardia proteus Krumbeck 1913 [synonym]
Protocardia salrivalis Harris 1919
Protocardia striatula Sowerby 1829
Protocardia stricklandi Morris and Lycett 1853
Protocardia subquadrata Evans and Shumard 1857
Protocardia truncata Sowerby 1827
Protocardia virginiana Conrad 1864
Subg. †Protocardium (Brevicardium) Stephenson 1941