Case, G.R. & Schwimmer, D.R. & Borodin, P.D. & Leggett, J.J. (2001)
A new selachian fauna from the Eutaw Formation (Upper Cretaceous/Early to Middle Santonian) of Chattahoochee County, Georgia. Palaeontographica, Abt. A, 261(4–6), 83–102

Cicimurri, D.J. & Weems, R.W. (2021)
First record of Ptychotrygon rugosum (Case, Schwimmer, Borodin, and Leggett, 2001) (Batomorphii, Sclerorhynchiformes, Ptychotrygonidae) in the United States Atlantic Coastal Plain. Journal of Vertebrate Paleontology, 41(2), Article e1933996
DOI: 10.1080/02724634.2021.1933996