Mutter, R.J. & Iturralde-Vinent, M.A. & Fernandez Carmona, J. (2005)
The first mesozoic Caribbean shark from the Turonian of Cuba: Ptychodus cyclodontis sp. nov. (? Neoselachii).
Journal of Vertebrate Paleontology, 25(4), 976–978 DOI: 10.1671/0272-4634(2005)025[0976:TFMCSI]2.0.CO;2