_- Aechminellidae
- Aechminidae
- Amphissitidae
- Aparchitidae
- Arcyzonidae
- Barychilinidae
- Beyrichiidae
- Beyrichiopsidae
- Bolliidae
- Cardiniferellidae
- Coelonellidae
- Ctenonotellidae
- Drepanellidae
- Eurychilinidae
- Glyptopleuridae
- Hollinellidae
- Hollinidae
- Kellettinidae
- Kirkbyellidae
- Kirkbyidae
- Kloedenellidae
- Knoxitidae
- Leperditellidae
- Miltonellidae
- Paraparchitidae
- Primitiidae
- Primitiopsidae
- Quadrijugatoridae
- Richinidae
- Scrobiculidae
- Tetradellidae
- Treposellidae
- Tribolbinidae
- Tricorninidae
- Tvaerenellidae
- Youngiellidae
- Zygobolbidae