Buynak, G.L. and Mohr JR, H.W., 1978. Larval development of the redbreast sunfish (Lepomis auritus) from the Susquehanna River. Transactions of the American Fisheries Society, 107(4), pp.600-604.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Hypentelium nigricans | Egg | Degree-days for incubation | 17.4; 10 | 174.0 °C * day |
| Hypentelium nigricans | Larvae | Initial larval size | 9-10.6 mm | 9.8 mm |
| Hypentelium nigricans | Egg | Egg size after water-hardening | 3.50 | 3.5 mm |
| Hypentelium nigricans | Egg | Egg adhesiveness | Non-adhesive | Non-Adhesive |
| Hypentelium nigricans | Egg | Egg Buoyancy | Demersal | Demersal |