| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Isognomon alatus (Gmelin, 1791) |
Flat tree-oyster | Western Atlantic | 7.2 |
| Isognomon anomioides (Reeve, 1858) |
Indo-Pacific | ||
| Isognomon bicolor (Adams, 1845) |
Bicolor purse-oyster | Western Atlantic | 3.5 |
| Isognomon californicum (Conrad, 1837) |
Eastern Central Pacific | ||
| Isognomon ephippium (Linnaeus, 1758) |
Saddle tree oyster | Indo-West Pacific | 14 |
| Isognomon fimbriatus (Reeve, 1859) |
Western Central Pacific | ||
| Isognomon incisum (Conrad, 1837) |
Eastern Pacific | ||
| Isognomon isognomum (Linnaeus, 1758) |
Wader tree oyster | Indo-Pacific | 15 |
| Isognomon janus Carpenter, 1857 |
Thin purse-oyster | Eastern Pacific | |
| Isognomon legumen (Gmelin, 1790) |
Pod tree oyster | Indo-Pacific | |
| Isognomon marsupialis Roding, 1798 |
Northwest Pacific | ||
| Isognomon nucleus (Lamarck, 1819) |
Indo-Pacific | ||
| Isognomon perna (Linnaeus, 1767) |
Rayed tree oyster | Indo-West Pacific | 7.5 |
| Isognomon radiatus (Anton, 1839) |
Radial purse-oyster | Western Atlantic | |
| Isognomon recognitus (Mabille, 1895) |
Purple purse-oyster | Eastern Pacific | |
| Isognomon vulselloides Macsotay & Campos, 2001 |
Western Atlantic | 1.58 |