|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Cardiida - Cardiidae
It was reranked as Cardium (Trachycardium) by Aldrich (1911), Vredenburg (1928), Loel and Corey (1932), Mukerjee (1939) and Pilsbry and Olsson (1941); it was reranked as Laevicardium (Trachycardium) by Grant and Gale (1931).
It was assigned to Laevicardium by Grant and Gale (1931); to Cardium by Aldrich (1911), Vredenburg (1928), Loel and Corey (1932), Mukerjee (1939) and Pilsbry and Olsson (1941); to Cardiidae by Marasti (1973) and Frassinetti and Covacevich (1999); to Trachycardiinae by Olsson (1967), da Silva Forti (1969), Iqbal (1973), Vokes (1980), Woodring (1982), Dockery (1982) and Coan et al. (2000); and to Veneroida by Sepkoski (2002).
|Year||Name and author|
|1911||Cardium (Trachycardium) Aldrich p. 1|
|1928||Cardium (Trachycardium) Vredenburg p. 445|
|1931||Laevicardium (Trachycardium) Grant and Gale|
|1932||Cardium (Trachycardium) Loel and Corey|
|1939||Cardium (Trachycardium) Mukerjee p. 15|
|1941||Cardium (Trachycardium) Pilsbry and Olsson p. 9|
|1967||Trachycardium Olsson p. 10|
|1969||Trachycardium da Silva Forti p. 81|
|1973||Trachycardium Iqbal p. 18|
|1973||Trachycardium Marasti p. 107|
|1980||Trachycardium Vokes p. 127|
|1982||Trachycardium Dockery p. 70|
|1982||Trachycardium Woodring p. 636|
|1999||Trachycardium Frassinetti and Covacevich p. 28|
|2000||Trachycardium Coan et al. p. 361|
|2002||Trachycardium Sepkoski, Jr.|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.