| Species | Name Used in Reference |
|---|---|
| Olivaichthys cuyanus (Ringuelet, 1965) | Diplomystes cuyanus (p. 228-231 ) |
| Olivaichthys mesembrinus (Ringuelet, 1982) | Diplomystes mesembrinus (p. 231--233 ) |
| Olivaichthys viedmensis (MacDonagh, 1931) | Diplomystes viedmensis (p. 224-228 ) |