Isognomonidae
| 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 | |
| 
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Isognomonidae is a family of medium-sized to large saltwater clams. They are pearl oysters, marine bivalve molluscs in the superfamily Pterioidea