Cardita is a genus of marine bivalve molluscs, in the family Carditidae. Especially in the early 18th century, this genus was often confused with its relative Cardites. This started with Jean-Baptiste Lamarck describing the present genus as Cardites in 1801. However, J.H.F. Link in 1807 used that name to establish a distinct genus. When this was realized, Megerle in 1811 re-described Link's genus as Cardita. In addition to the numerous junior synonyms, Byssomera – usually included in Carditamera nowadays – might actually belong in Cardita too.