Smith, G.R., 1966. Distribution and evolution of the North American catostomid fishes of the subgenus Pantosteus, genus Catostomus.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Catostomus discobolus | Egg | Oocyte diameter | 1.30 | 1.3 mm |
| Catostomus columbianus | Egg | Oocyte diameter | 2.80 | 2.8 mm |
| Catostomus plebeius | Egg | Oocyte diameter | 1.50 | 1.5 mm |
| Catostomus santaanae | Egg | Oocyte diameter | 1.50 | 1.5 mm |