Page, L.M. and Smith, P.W., 1971. The life history of the slenderhead darter, Percina phoxocephala, in the Embarras River, Illinois. Biological notes; no. 074.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Percina phoxocephala | Egg | Oocyte diameter | 1.30 | 1.3 mm |
| Percina phoxocephala | Egg | Egg adhesiveness | Adhesive | Adhesive |
| Percina phoxocephala | Egg | Egg Buoyancy | Pelagic | Pelagic |