| Date Note | Species first referenced in Egerton (1843), Willett changes his name in 1863 from Catt. |
| Administrative History | Egerton renamed Ischyodus gigas Egerton to Edaphodon gigas Egerton in 1847, see: Newton, E T, 'The Chimaeroid Fishes of the British Cretaceous Rocks', Memoirs of the Geological Survey, Monograph IV, 1878, p18.
May be connected to: Egerton, P M G, "Supplement to the Memoir to the fossil species of Chimaera", Proceedings of the Geological Society', vol 4 (1843), p211. |