Begat, A.; Kriwet, J.; Gelfo, J. N.; Cavalli, S. G.; Schultz, J. A.; Martin, T. (2022). The first southern hemisphere occurrence of the extinct Cretaceous sclerorhynchoid sawfish Ptychotrygon (Chondrichthyes, Batoidea), with a review of Ptychotrygon taxonomy. Journal of Vertebrate Paleontology. 42(2).
Begat, A.; Kriwet, J.; Gelfo, J. N.; Cavalli, S. G.; Schultz, J. A.; Martin, T.
2022
The first southern hemisphere occurrence of the extinct Cretaceous sclerorhynchoid sawfish <i>Ptychotrygon</i> (Chondrichthyes, Batoidea), with a review of <i>Ptychotrygon</i> taxonomy