A class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts.
| BIVALVIA (MUSSELS OR OYSTERS) | instanceof | MUSSELS |
| BIVALVIA (MUSSELS OR OYSTERS) | instanceof | OYSTERS |
| MUSSELS | isa | BIVALVIA (MUSSELS OR OYSTERS) |
| OYSTERS | isa | BIVALVIA (MUSSELS OR OYSTERS) |
| Id | Concept in source | Conceptlist |
|---|---|---|