CASE, G.R. & CAPPETTA, H. (1997)
A new selachian fauna from the Late Maastrichtian of Texas (Upper Cretaceous/Navarro Group; Kemp Formation). Münchner Geowissenschaftliche Abhandlungen, (A), 34: 131–189, 10 fig., 15 pl.
HARTSTEIN, E. & DECINA, L. & KEIL, R. (1999)
A late Cretaceous (Severn Formation) Vertebrate Assemblage from Bowie Maryland. Mosasaur, 6: 17–24