Bakar, J.A. and Heins, D.C., 1994. Reproductive life history of the North American madtom catfish, Noturus hildebrandi (Bailey & Taylor 1950), with a review of data for the genus. Ecology of Freshwater Fish, 3(4), pp.167-175.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Noturus nocturnus | Egg | Oocyte diameter | 1.80-2.30 | 2.05 mm |
| Noturus nocturnus | Egg | Oocyte diameter | 2.00 | 2.0 mm |