Branson, E.B. (1916)
The Lower Embar of Wyoming and Its Fauna. Journal of Geology, 24(7), 639–664

Ginter, M. & Hampe, O. & Duffin, C.J. (2010)
Handbook of Paleoichthyology, Vol. 3D: Chondrichthyes Paleozoic Elasmobranchii: Teeth Verlag Dr. Friedrich Pfeil, pp. 168, 154 fig., 4 Tab.

Hodnett, J.-P.M. & Elliott, D.K. & Olsen, T.J. (2011)
The Petalodontiformes (Chondrichthyes; Euchondrocephali) from the Marine Permian (Leonardian/Guadeloupian) Kaibab Formation, Northern Arizona [Abstract]. Society of Vertebrate Paleontology 71st Meeting

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