Opinions from J. A. Schneider 2002
- 'Acanthocardia was reranked as Cardium (Acanthocardia) and belongs to Cardium' according to Melvill 1907
- 'Acanthocardia belongs to Acanthocardiini'
- 'Acanthocardiini belongs to Fraginae'
- 'Afrocardium belongs to Orthocardiinae'
- 'Afrocardium was reranked as Fragum (Afrocardium) and belongs to Fragum' according to le Tomlin 1931
- 'Bucardium belongs to Cardiinae'
- 'Bucardium (Bucardium) belongs to Bucardium' according to Gray 1853
- 'Bucardium (Europicardium) belongs to Orthocardiinae'
- 'Cardiinae belongs to Cardiidae'
- 'Cardiini belongs to Cardiinae'
- 'Cardium belongs to Cardiinae'
- 'Cardium (Acanthocardia) dissidepictum is recombined as Agnocardia dissidepictum'
- 'Cardium (Acanthocardia) dissidepictum belongs to Cardium (Acanthocardia)' according to Woodring 1925
- 'Cardium (Acanthocardia) elnaggari belongs to Cardium (Acanthocardia)' according to Abbass 1972
- 'Cardium (Acanthocardia) elnaggari is recombined as Agnocardia elnaggari'
- 'Cardium (Acanthocardia) exochum belongs to Cardium (Acanthocardia)' according to Melvill 1907
- 'Cardium (Acanthocardia) exochum is recombined as Afrocardium exochum'
- 'Cardium (Fragum) crenelloides belongs to Cardium (Fragum)' according to Melvill 1909
- 'Cardium (Fragum) crenelloides is recombined as Afrocardium crenelloides'
- 'Cardium (Fragum) roseolum belongs to Cardium (Fragum)' according to Melvill 1909
- 'Cardium (Fragum) roseolum is recombined as Afrocardium roseolum'
- 'Cardium (Granocardium) was reranked as Granocardium and belongs to Cardiidae'
- 'Cardium (Rudicardium) mahgoobi belongs to Cardium (Rudicardium)' according to Abbass 1972
- 'Cardium (Rudicardium) mahgoobi is recombined as Agnocardia mahgoobi'
- 'Cardium (Rudicardium) mokattamensis belongs to Cardium (Rudicardium)' according to Abbass 1972
- 'Cardium (Rudicardium) mokattamensis is recombined as Agnocardia mokattamensis'
- 'Cardium (Trachycardium) cantuariense belongs to Cardium (Trachycardium)' according to Laws 1933
- 'Cardium (Trachycardium) cantuariense is recombined as Hedecardium (Titanocardium) cantuariense'
- 'Cardium (Trachycardium) cinderellae belongs to Cardium (Trachycardium)' according to Maury 1917
- 'Cardium (Trachycardium) cinderellae is recombined as Agnocardia cinderellae'
- 'Cardium (Trachycardium) claibornense is recombined as Agnocardia claibornense'
- 'Cardium (Trachycardium) infantule belongs to Cardium (Trachycardium)' according to Nomura and Zinbo 1934
- 'Cardium (Trachycardium) infantule is recombined as Afrocardium infantule'
- 'Cardium (Trachycardium) machaporiensis belongs to Cardium (Trachycardium)' according to Maury 1925
- 'Cardium (Trachycardium) machaporiensis is recombined as Agnocardia machaporiensis'
- 'Cardium (Trachycardium) pessoae belongs to Cardium (Trachycardium)' according to Maury 1925
- 'Cardium (Trachycardium) pessoae is recombined as Agnocardia pessoae'
- 'Cardium (Trachycardium) polycolpatum belongs to Cardium (Trachycardium)' according to Cossmann and Peyrot 1911
- 'Cardium (Trachycardium) polycolpatum is recombined as Europicardium polycolpatum'
- 'Cardium (Trachycardium) thalassium belongs to Cardium (Trachycardium)' according to Maury 1925
- 'Cardium (Trachycardium) thalassium is recombined as Agnocardia thalassium'
- 'Cardium (Trachycardium) waitakiense belongs to Cardium (Trachycardium)' according to Suter 1907
- 'Cardium (Trachycardium) waitakiense is recombined as Hedecardium (Hedecardium) waitakiense'
- 'Cardium acrocome belongs to Cardium' according to Dall 1900
- 'Cardium acrocome is recombined as Agnocardia acrocome'
- 'Cardium ameghinoi is recombined as Hedecardium (Iheringicardium) ameghinoi'
- 'Cardium arabicus belongs to Cardium' according to Issel 1869
- 'Cardium arabicus is a subjective synonym of Cardium richardi'
- 'Cardium brunneri is recombined as Hedecardium (Hedecardium) brunneri'
- 'Cardium caparti belongs to Cardium' according to Nickles 1955
- 'Cardium caparti is recombined as Europicardium caparti'
- 'Cardium carditaeforme belongs to Cardium' according to Reeve 1845
- 'Cardium carditaeforme is recombined as Afrocardium carditaeforme'
- 'Cardium convexum belongs to Cardium' according to Deshayes 1858
- 'Cardium convexum is recombined as Agnocardia convexa'
- 'Cardium cossmanni belongs to Cardium' according to Vincent 1882
- 'Cardium cossmanni is recombined as Agnocardia cossmanni'
- 'Cardium defrancii belongs to Cardium' according to Deshayes 1858
- 'Cardium defrancii is recombined as Afrocardium defrancii'
- 'Cardium euglyptum belongs to Cardium' according to Sowerby 1914
- 'Cardium euglyptum is recombined as Afrocardium euglyptum'
- 'Cardium glebosum is recombined as Agnocardia glebosum'
- 'Cardium greyi belongs to Cardium' according to Hutton 1873
- 'Cardium greyi is recombined as Hedecardium (Titanocardium) greyi'
- 'Cardium hirsutum belongs to Cardium' according to Bronn 1831
- 'Cardium hirsutum is recombined as Afrocardium hirsutum'
- 'Cardium kanlenum belongs to Cardium' according to Cotter 1923
- 'Cardium kanlenum is recombined as Hedecardium (Hedecardium) kanlenum'
- 'Cardium moniletectum is recombined as Hedecardium (Hedecardium) moniletectum'
- 'Cardium multicostatum belongs to Cardium' according to Brocchi 1814
- 'Cardium multicostatum is recombined as Europicardium multicostatum'
- 'Cardium patagonicum is recombined as Hedecardium (Iheringicardium) patagonicum'
- 'Cardium philippi is recombined as Hedecardium (Iheringicardium) philippi'
- 'Cardium philippi belongs to Cardium' according to Ihering 1897
- 'Cardium pseudomagnum is recombined as Hedecardium (Hedecardium) pseudomagnum'
- 'Cardium pseudomulticostatum belongs to Cardium' according to Zhizhchenko 1934
- 'Cardium pseudomulticostatum is recombined as Europicardium pseudomulticostatum'
- 'Cardium rectispina belongs to Cardium' according to Koenen 1893
- 'Cardium rectispina is recombined as Agnocardia rectispina'
- 'Cardium richardi belongs to Cardium' according to Audoin 1827
- 'Cardium richardi is recombined as Afrocardium richardi'
- 'Cardium rubescens belongs to Cardium' according to Smith 1911
- 'Cardium rubescens is recombined as Afrocardium rubescens'
- 'Cardium skeeti belongs to Cardium' according to Hedley 1906
- 'Cardium skeeti is recombined as Afrocardium skeeti'
- 'Cardium sorrentoensis is recombined as Agnocardia sorrentoensis'
- 'Cardium subcordatum belongs to Cardium' according to Suter 1917
- 'Cardium subcordatum is recombined as Hedecardium (Hedecardium) subcordatum'
- 'Cardium verrucosum is recombined as Freneixicardia verrucosa'
- 'Chesacardium belongs to Cardiinae'
- 'Dinocardiini belongs to Cardiinae'
- 'Dinocardium belongs to Cardiinae'
- 'Fraginae belongs to Cardiidae'
- 'Fragum (Afrocardium) shepstonense belongs to Fragum (Afrocardium)' according to le Tomlin 1931
- 'Fragum (Afrocardium) shepstonense is recombined as Afrocardium shepstonense'
- 'Freneixicardia belongs to Orthocardiinae'
- 'Hedecardium belongs to Orthocardiinae'
- 'Hedecardium (Hedecardium) belongs to Hedecardium' according to Marwick 1944
- 'Hedecardium (Hedecardium) belongs to Hedecardium'
- 'Hedecardium (Titanocardium) belongs to Hedecardium'
- 'Hedecardium (Titanocardium) marwicki belongs to Hedecardium (Titanocardium)' according to Maxwell 1978
- 'Hedecardium (Titanocardium) marwicki belongs to Hedecardium (Titanocardium)'
- 'Hedecardium olssoni belongs to Hedecardium' according to Marwick 1944
- 'Hedecardium olssoni is recombined as Hedecardium (Hedecardium) olssoni'
- 'Iheringicardium was reranked as Hedecardium (Iheringicardium) and belongs to Hedecardium'
- 'Laevicardium (Plagiocardium) infinum belongs to Laevicardium (Plagiocardium)' according to Gilbert 1836
- 'Laevicardium (Plagiocardium) infinum is recombined as Afrocardium infinum'
- 'Loxocardium belongs to Orthocardiinae'
- 'Nemocardium belongs to Cardiidae'
- 'Orthocardiinae belongs to Cardiidae'
- 'Orthocardium belongs to Orthocardiinae'
- 'Perucardia belongs to Cardiidae'
- 'Plagiocardium was reranked as Laevicardium (Plagiocardium) and belongs to Laevicardium' according to Gilbert 1936
- 'Plagiocardium belongs to Cardiidae'
- 'Plagiocardium (Schedocardia) was reranked as Schedocardia and belongs to Cardiinae'
- 'Planicardium belongs to Cardiinae'
- 'Rudicardium belongs to Cardiinae'
- 'Rudicardium was reranked as Cardium (Rudicardium) and belongs to Cardium' according to Abbass 1972
- 'Sawkinsia belongs to Cardiidae'
- 'Trachycardium (Agnocardia) is reassigned into Orthocardiinae'
- 'Trachycardium badeniense belongs to Trachycardium' according to Kokay 1996
- 'Trachycardium badeniense is recombined as Europicardium badeniense'
- 'Vepricardiini belongs to Cardiinae'
- 'Vepricardium belongs to Cardiinae'