GRYPOSAURUS LATIDENS HORNER, 1992

Diagnosis (after Horner, 1992): Dentary teeth shorter and wider than in other species of the genus. In addition, G. latidens possesses the following unique combination of characters: arched lateroventral margin on the maxilla; nasal arch positioned near the orbits and rising above the level of the frontals; and broad ‘U’-shaped posterior margin of the external naris. The humerus of G. latidens is larger and more robust than that of G. incurvimanus .

Holotype: AMNH 5465, partial skull and nearly complete skeleton.