Archiheterodonta
Archiheterodonta is an infraclass of bivalve molluscs. It consists of the Carditida and the extinct Actinodontida orders.- Order: †Actinodontida
- * Superfamily: †Amnigenioidea
- ** Family: †Amnigeniidae
- ** Family: †Montanariidae
- ** Family: †Zadimerodiidae
- * Superfamily: †Anodontopsoidea
- ** Family: †Actinodontidae
- ** Family: †Anodontopsidae
- ** Family: †Baidiostracidae
- ** Family: †Cycloconchidae
- ** Family: †Intihuarellidae
- ** Family: †Redoniidae
- * Superfamily: †Nyassoidea
- ** Family: †Nyassidae
- * Superfamily: †Oriocrassatelloidea
- ** Family: †Crassatellopsidae
- ** Family: †Oriocrassatellidae
- * Superfamily: †Palaeomuteloidea
- ** Family: †Palaeomutelidae
- Order: Carditida
- * Superfamily: Carditoidea
- ** Family: Carditidae
- ** Family: Condylocardiidae
- * Superfamily: Crassatelloidea
- ** Family: Crassatellidae
- ** Family: Astartidae
