| Isognomonidae | |
|---|---|
|   | |
| Shell of Isognomon ephippium (specimen at MNHN, Paris) | |
|  Scientific classification   | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Bivalvia | 
| Order: | Pteriida | 
| Superfamily: | Pterioidea | 
| Family: |  Isognomonidae  Woodring, 1925 (1828)  | 
| Genera | |
See text  | |
| Synonyms | |
  | |
Isognomonidae is a family of medium-sized to large saltwater clams. They are pearl oysters, marine bivalve molluscs in the superfamily Pterioidea [1]