| Date Note | Discovery of specimen, date of publication |
| Description | Watercolour, with scale detail with enlargement, of an imperfect specimen of the fossil fish Palaeoniscus egertoni Agassiz, by Joseph Dinkel, [1835-1852]. From the coalshale, Silverdale Pits, near Newcastle-under-Lyne. |
| Administrative History | The specimen was discovered by Philip de Malpas Egerton's brother the Reverend William Egerton in the coal shale of the Silverdale Pits, near Newcastle-under-Lyne in 1835. [See also: Egerton, P M G, "On the discovery of Ichthyolites in the
south-western portion of the North-Staffordshire coal-field", Proceedings of the Geological Society, vol 2 (1835), pp. 202-203]. The specimen is referenced in Egerton, P M G, "Palichthyologic Notes. No. 3.- On the Ganoidei Heteraocerci", Quarterly Journal of the Geological Society, vol 6 (1850), p5. |