Guinot, G. & Condamine, F.L. (2023)
Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays. Science, 379, 802–806
DOI: 10.1126/science.abn2080

Maisch, H.M. & Becker, M.A. & Shimada, K. (2021)
Fossil fishes from a lag deposit within the Upper Cretaceous Mancos Shale in New Mexico, USA, with comments on correlative Turonian-Coniacian time-transgressive lags in the Western Interior Seaway of North America Cretaceous Research, 26, Article 104886
DOI: 10.1016/j.cretres.2021.104886

Ouroumova, O. & Shimada, K. & Kirkland, J.I. (2016)
Fossil Marine Vertebrates from the Blue Hill Shale Member (Middle Turonian) of the Upper Cretaceous Carlile Shale in Northeastern Nebraska. Transactions of the Kansas Academy of Science, 119(2), 211–221
DOI: 10.1660/062.119.0213

Hamm, S.A. & Cicimurri, D.J. (2011)
Early coniacian (late cretaceous) selachian fauna from the basal Atco Formation, lower Austin Group, north central Texas. Paludicola, 8(3), 107–127

Lucas, S.G. & Heckert, A.B. (2005)
Distribution, age and correlation of Cretaceous fossil vertebrates from Arizona. New Mexico Museum of Natural History and Science, Bulletin, 29, 104–109

Cappetta, H. & Case, G.R. (1999)
Additions aux faunes de sélaciens du Crétacé du Texas (Albien supérieur-Campanien). Palaeo Ichthyologica, 9, 5–111

Williamson, T.E. & Kirkland, J.I. & Lucas, S.G. (1993)
Selachians from the Greenhorn cyclothem («Middle» Cretaceous: Cenomanian-Turonian), Black Mesa, Arizona, and the paleogeographic distribution of late Cretaceous selachians. Journal of Paleontology, 67(3), 447–474

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

McNulty, C.L. & Slaughter, B.H. (1972)
The Cretaceous Selachian Genus, Ptychotrygon JAEKEL 1894. Eclogae Geologicae Helvetiae, 65(3), 647–656