MCNULTY, C.L. & SLAUGHTER, B.H. (1972)
The Cretaceous Selachian Genus, Ptychotrygon JAEKEL 1894. Eclogae Geologicae Helvetiae, 65 (3): 647–656, fig. 1–2, pl. 1.
WELTON, B.J. & FARISH, R.F. (1993)
The collector's guide to fossil sharks and rays from the Cretaceous of Texas. Before Time, Lewisville, 1993
CALLAHAN, W.R. & MEHLING, C.M. & DENTON, R.K. & PARRIS, D.C. (2014)
Vertebrate Paleontology and Stratigraphy of the Late Cretaceous Holmdel Park Site, Monmouth County, New Jersey. Dakoterra, 6: 163–169
SCHUBERT, J.A. & WICK, S.L. & LEHMAN, T.M. (2017)
An Upper Cretaceous (middle Campanian) marine chondrichthyan and osteichthyan fauna from the Rattlesnake Mountain sandstone member of the Aguja Formation in West Texas. Cretaceous Research, 69: 6–33
DOI: 10.1016/j.cretres.2016.08.008