Mandibles of caenagnathids from Dinosaur Park Formation. A, NMC 8776, holotype of "Caenagnathus collinsi" Sternberg, 1932; B, RTMP 92.36.390 ("C." "sternbergi"); C, RTMP 91.144.1 ("C." "sternbergi"). After Currie, Godfey and Nessov, 1994.