- Class Gastropoda
- Class Bivalvia
- Class Cephalopoda (intelligent marine animals)
- Class Polyplacophora (chitons)
- Class Scaphopoda (tusk shells)
- Class Monoplacophora
- Class Aplacophora (worm-like mollusks)
| Phylum | Class | Subclass |
| Mollusca | Gastropoda | · Prosobranchia |
| Bivalvia | · Heterodonta · Pteriomorphia | |
| Cephalopoda | · Nautiloidea · Ammonoidea · Coleoidea | |
| Polyplacophora | ||
| Scaphopoda | ||
| Monoplacophora | ||
| Aplacophora |