| Date Note | Date given to other drawings of this genus from this collection |
| Administrative History | Although not published, it may be connected to: Egerton, P M G, “On Chondrosteus, an Extinct Genus of the Sturionidae, Found in the Lias Formation at Lyme Regis”, ‘Philosophical Transactions of the Royal Society of London’, vol 148 (1858). Species referenced on page 883. |