Research in the 1990s revealed an arched nasal crest thought to be distinctive of the hadrosaurid
In the 1990s, researchers found an arched nasal crest previously associated with another dinosaur, the hadrosaurid
vertebra was recovered during a palynological survey of the Upper Cretaceous Kanguk Formation in the eastern Canadian Arctic.
Detailed study of the skeleton of "Joe" identified it as the most complete specimen yet known for Parasaurolophus (pronounced PAIR-uh-SORE-AH-luf-us), a duck-billed (hadrosaurid
) dinosaur that lived throughout western North America around 75 million years ago.
Woodbine outcrops along Bear Creek near the south entrance to Dallas-Fort Worth International Airport have produced crocodilian, theropod, nodosaurid and hadrosaurid
remains (Lee 1997).
In this sedimentary unit, a large array of fossil vertebrates were collected, including, perciform and dipnoan fishes, sphenodontian lizards, chelid turtles, hadrosaurid
, abelisaurid and titanosaurian dinosaurs, as well as, two ornithurine birds, and dryolestoid and multituberculate mammals (CLARKE & CHIAPPE, 2001; MARTINELLI & FORASIEPI, 2004; ROUGIER et al., 2009).
Today I'm enquiring about a 90m-year-old Hadrosaurid
Egg from China.
Morphometric observations on hadrosaurid
This finding has confused him because evidence suggests that hypacrosaurs and other members of the hadrosaurid
family apparently nurtured their young.
The sheer number of teeth gave the hadrosaurid
, a plant-eating dinosaur, the ability to chew on abrasive plants.
(Dinosauria: Ornithischia) from the Late Cretaceous (Campanian) Kanguk Formation of Axel Heiberg Island, Nunavut, Canada and Its Ecological and Geographical Implications.
The pair discovered tooth marks on a femur bone from a Champsosaurus, an aquatic reptile that grew up to five feet long; the rib of a dinosaur, most likely a hadrosaurid
or ceratopsid; the femur of another large dinosaur that was likely an ornithischian; and a lower jaw bone from a small marsupial.