After Sullivan, 2003
†Prenocephale Marya´nska & Osmólska, 1974
†Trooodon
†Stegoceras
†Sphaerotholus Williamson & Carr, 2003
†Prenocephale prenes Marya´nska & Osmólska, 1974
†Prenocephale brevis (Lambe, 1918b) Sullivan, 2000
Stegoceras brevis Lambe, 1918b
Troodon validus (Lambe,1902) Brown & Schlaikjer, 1943
Stegoceras brevis Lambe; Sternberg, 1945
Stegoceras breve (Lambe); emend. Sues & Galton, 1987
Prenocephale brevis (Lambe) Sullivan, 2000
Stegoceras breve (Lambe); Williamson & Carr, 2003
Prenocephale brevis (Lambe) Sullivan, 2003
†Prenocephale edmontonensis (Brown & Schlaikjer, 1943) Sullivan, 2000
Troodon edmontonense Brown & Schlaikjer, 1943
Stegoceras edmontonense (Brown & Schlaikjer); Sternberg, 1945
Stegoceras edmontonensis (Brown & Schlaikjer); Wall & Galton, 1979 (lapsus calami)
Stegoceras edmontonensis (Brown & Schlaikjer); Sues & Galton, 1983 (lapsus calami)
Stegoceras edmontonenis (Brown & Schlaikjer); Sternberg, 1945; [sic]; Sullivan, 2000 (lapsus calami)
Stegoceras edmontonense (Brown & Schlaikjer) Sues & Galton, 1987 (lapsus calami)
Stegoceras edmontonense (Brown & Schlaikjer) Griffin, 1989 (lapsus calami)
Prenocephale edmontonensis (Brown & Schlaikjer) Sullivan, 2000
Sphaerotholus buchholtzae Williamson & Carr, 2003
Prenocephale edmontonensis (Brown & Schlaikjer) Sullivan, 2003
†Prenocephale goodwini (Williamson & Carr, 2003) Sullivan, 2003
†Sphaerotholus goodwini Williamson & Carr, 2003
†Prenocephale goodwini (Williamson & Carr, 2003) Sullivan, 2003
Reference(s):
Sullivan, R. M., 2000: Stegoceras revisited.
–Journal of Vertebrate Paleontology: Vol. 20, #3, suppl. to #3, 72A
Sullivan, R. M., 2003: Revision of the dinosaur Stegoceras Lambe (Ornithischia, Pachycephalosauria).
–Journal of Vertebrate Paleontology: Vol. 23, #1, pp. 181-207
Williamson, T. E. & Carr, T. D., 2003: A new genus of derived pachycephalosaurian from western North America.
–Journal of Vertebrate Paleontology: Vol. 22, #4, pp. 779-801
