Comments

Shape and rostrocaudal breadth of the dorsal margin of the infratemporal fenestra relative to that of the dorsal orbital margin. State 1: subtriangular, with a dorsal infratemporal margin that is narrower than the ventral margin. This figure shows the outlines of a number of hadrosaurid taxa in right lateral view. A, Brachylophosaurus canadensis (MOR 794). B, Edmontosaurus annectens (CMN 8399). C, E. annectens (CMN 8509, subadult). D, E. annectens (DMNH 1943). E, E. annectens (SM R4036). F, E. regalis (AMNH 5254). G, E. regalis (CM 26258). H, E. regalis (CMN 2288). I, E. regalis (ROM 801). J, E. regalis (FMNH P15004). K, Parasaurolophus walkeri (ROM 768). L, Prosaurolophus maximus (CMN 2870). M, P. maximus (TMP 84.1.1). N, Saurolophus osborni (AMNH 5220).

Determination annotations

Other Annotations