Itano, W.M. (2020)
The holotype of Psephodus minutus Wellburn, 1901 (Chondrichthyes, Cochliodontiformes) is a gastropod steinkern. Proceedings of the Yorkshire Geological Society, 63(3), Article pygs2020-004
DOI: 10.1144/pygs2020-004

Schnetz, L. & Dunne, E.M. & Feichtinger, I. & Butler, R.J. & Coates, M.I. & Sansom, I.J. (2024)
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, in press
DOI: 10.1017/pab.2024.1