Classification of the genus Hedecardium
G. †Hedecardium Marwick 1944
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Subg. †Hedecardium (Hedecardium) Marwick 1944
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†Hedecardium (Hedecardium) brunneri Hector 1886
†Hedecardium (Hedecardium) kanlenum Cotter 1923
†Hedecardium (Hedecardium) moniletectum Tate 1887
†Hedecardium (Hedecardium) olssoni Marwick 1944
†Hedecardium (Hedecardium) pseudomagnum McCoy 1877
†Hedecardium (Hedecardium) subcordatum Suter 1917
†Hedecardium (Hedecardium) waitakiense Suter 1907
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†Hedecardium (Iheringicardium) ameghinoi Ihering 1907
†Hedecardium (Iheringicardium) patagonicum Ihering 1907
†Hedecardium (Iheringicardium) philippi Ihering 1897
Subg. †Hedecardium (Titanocardium) Maxwell 1978
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†Hedecardium (Titanocardium) cantuariense Laws 1933
†Hedecardium (Titanocardium) greyi Hutton 1873
†Hedecardium (Titanocardium) marwicki Maxwell 1978
†Hedecardium collinsi Marwick 1960
†Hedecardium greyi Hutton 1873
†Hedecardium ogurai Otuka 1938
†Hedecardium septuagenarium Tate 1887
†Hedecardium subcordatum Suter 1917
†Hedecardium waitakiense Suter 1917
†Vepricardium (Hedecardium) sharpei Archaic and Haime 1854