| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Unio | species | 134 |
| 2 | Unio | mancus | 112 |
| 3 | Unio | pictorum | 80 |
| 4 | Unio | tumidus | 71 |
| 5 | Unio | crassus | 21 |
| 6 | Unio | douglasiae | 12 |
| 7 | Unio | conus | 11 |
| 8 | Unio | ovata | 9 |
| 9 | Unio | requieni | 9 |
| 10 | Unio | tigridis | 8 |
| 11 | Unio | delphinus | 7 |
| 12 | Unio | gibbus | 6 |
| 13 | Unio | caffer | 5 |
| 14 | Unio | moreletianus | 5 |
| 15 | Unio | durieui | 3 |
| 16 | Unio | tampicoensis | 1 |
| 17 | Unio | bucheti | 1 |