Description of a new species of Petalodus (P. securiger) from the Carboniferous of Illinois. Journal of Geology, 3(5), 561–564
Handbook of Paleoichthyology, Vol. 3D: Chondrichthyes Paleozoic Elasmobranchii: Teeth Verlag Dr. Friedrich Pfeil, pp. 168, 154 fig., 4 Tab.
