[D] Gryposaurus notabilis [Su] [T]
Cretaceous Late Campanian
Ornithischia Ornithopoda Hadrosauridae Hadrosaurinae Gryposaurini
Judith River Group (Wedge), Alberta, Canada
Typespecies - Skull
Gryposaurus (Lambe, 1914) > Gryposaurus notabilis (Lambe, 1914) = \\\\\\\"Hadrosauravus\\\\\\\" (Lambert, 1990)
Gryposaurus > Gryposaurus latidens (Horner, 1992)
Gryposaurus > Gryposaurus monumentensis (Sampson & Fates 2007)
Gryposaurus > Gryposaurus incurvimanus (Parks, 1920) > \\\\\\\"Kritosaurus incurvimanus\\\\\\\" (Parks, 1920)
CMN 2278, complete articulated skull.
Approximately 10 complete skulls, 12 fragmentary skulls, associated postcrania.
Hadrosaurids of the genus Gryposaurus with the following unique combination of characters: sigmoidal lateroventral margin of the maxilla; large nasal arch located near the orbits and rising above the level of the frontals; narrow ‘U’-shaped posterior margin of the external naris; squamosal posterodorsal margin well above the level of the skull roof; infratemporal fenestra larger than the orbit; and rounded mandibular foramen. The skull of G. notabilis is generally more robust than that of Gryposaurus latidens and G. incurvimanus, but less so than that of Gryposaurus monumentensis. (Sampson & Fates 2007)