_- Allodesmatidae
- Antipleuridae
- Carydiidae
- Cetoconchidae
- Chondrodontidae
- Clavagellidae
- Cleidothaeridae
- Clistoconchidae
- Colpomyidae
- Cuspidariidae
- Cycloconchidae
- Cyrtodontidae
- Cyrtorostridae
- Etheripectinidae
- Euciroidae
- Fordillidae
- Grammysiidae
- Halonymphidae
- Laternulidae
- Leiopectinidae
- Leptochondriidae
- Lyonsiellidae
- Lyonsiidae
- Lyrodesmatidae
- Megadesmidae
- Microdontidae
- Myochamidae
- Myopholadidae
- Nucularcidae
- Orthonotidae
- Palaeomutelidae
- Pandoridae
- Parilimyidae
- Penicillidae
- Periplomatidae
- Pholadomyacidae
- Pholadomyidae
- Poromyidae
- Praecardiidae
- Protocuspidariidae
- Pseudomonotidae
- Redoniidae
- Sanguinolitidae
- Slavidae
- Spheniopsidae
- Thraciidae
- Verticordiidae