Subclass
Isofilibranchia Iredale, 1939
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Bivalvia |
| Subclass | Heterodonta |
| Isofilibranchia | |
| Order | Mytiloidea |
| Subclass | Palaeoheterodonta |
| Protobranchia | |
| Pteriomorphia | |
| Cohort | Mytilomorphi |
| Superorder | Nepiomorphia |
| Ostreiformii | |
| Order | Fordillida |
| Pectinida | |
| Solenida | |
| Trigoniida | |
| Tuarangiida |