The nomenclatural history of this taxon is complicated and was clarified by Foster & Philip (1976a). They showed Galeraster australiae Cotteau, 1890 to be synonymous with Corystus dysasteroides (Duncan).
Cotteau, G. 1890. Échinides nouveaux ou peu connus (9). Memoires de la Société zoologique de France, 3, 537-550, pls 17, 18.
Foster, R. J. & Philip, G. M. 1976a. Corystus dysasteroides, a Tertiary holasteroid echinoid formerly known as Duncaniaster australiae. Transactions of the Royal Society of South Australia 100, 113-116.