Fig 1.
Premaxillae of the PCF hadrosaurine (A-F). DMNH 22716, partial left and right premaxillae in left lateral (A), dorsal (B), and anterior (C) views. UAMES 12995, cast of a partial right premaxilla in right lateral (D), anterior (E), and dorsal (F) views. Premaxillae of immature Edmontosaurus annectens ROM 53525(G), mature Edmontosaurus annectens ROM 64076 (H), Edmontosaurus regalis FMNH P15004 (I), Prosaurolophus maximus CMN 2870 (J), Brachylophosaurus canadensis CMN 8893 (K), and Gryposaurus notabilis CMN 2278 (L) in dorsal views.