n = 4
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Ichthyoelephas humeralis | (Günther, 1860) | Ichthyoelephas humeralis | Prochilodontidae | |
| Ichthyoelephas longirostris | (Steindachner, 1879) | Ichthyoelephas longirostris | Prochilodontidae | |
| Ichthyoelephas patalo | Posada, 1909 | Ichthyoelephas longirostris | Prochilodontidae | |
| Ichthyoelephas stigmaturus | (Fowler, 1911) | Steindachnerina dobula | Curimatidae |