 The geographic range of Kritosaurus remains in North America was expanded by the discovery of bones from the late Campanian @-@ age Aguja Formation of Texas , including a skull . Additionally , a partial skull from Coahuila , Mexico has been referred to K. navajovius . A partial skeleton from the Sabinas Basin in Mexico was described as Kritosaurus sp. by Jim Kirkland and colleagues , but considered an indeterminate saurolophine by Prieto @-@ Márquez ( 2013 ) . This skeleton is about 20 % larger than other known specimens , around 11 meters [ 36 ft ] long , and with a distinctively curved ischium , and represents the largest known well @-@ documented North American saurolophine . Unfortunately , the nasal bones are also incomplete in the skull remains from this material . 
