Cardiida

Cardiida is an order of bivalves belonging to the class Bivalvia.

Families:
 * Cardiidae
 * Donacidae
 * Ephippiodontidae
 * Ferganoconchidae
 * Glaucomyidae
 * Goniocardiidae
 * Icanotiidae
 * Lahillidae
 * Limnocyrenidae
 * Lutetidae
 * Psammobiidae
 * Pterocardiidae
 * Quenstedtiidae
 * Semelidae
 * Solecurtidae
 * Sowerbyidae
 * Tancrediidae
 * Tellinidae
 * Unicardiopsidae