| Scientific Name | Author | English Name |
|---|---|---|
| Isognomon alatus | (Gmelin, 1791) | Flat tree-oyster |
| Isognomon anomioides | (Reeve, 1858) | |
| Isognomon bicolor | (Adams, 1845) | Bicolor purse-oyster |
| Isognomon californicum | (Conrad, 1837) | |
| Isognomon ephippium | (Linnaeus, 1758) | Saddle tree oyster |
| Isognomon incisum | (Conrad, 1837) | |
| Isognomon isognomum | (Linnaeus, 1758) | Wader tree oyster |
| Isognomon janus | Carpenter, 1857 | Thin purse-oyster |
| Isognomon legumen | (Gmelin, 1790) | Pod tree oyster |
| Isognomon marsupialis | Roding, 1798 | |
| Isognomon nucleus | (Lamarck, 1819) | |
| Isognomon perna | (Linnaeus, 1767) | Rayed tree oyster |
| Isognomon radiatus | (Anton, 1839) | Radial purse-oyster |
| Isognomon recognitus | (Mabille, 1895) | Purple purse-oyster |
| Isognomon vulselloides | Macsotay & Campos, 2001 | |
| Parviperna nucleus | (Lamarck, 1819) |