Edmontosaurus annectens Skull Plaque measures 46×24 in. The Edmontosaurus annectens Skull Plaque is Museum quality fossil polyurethane cast made in USA. Hadrosaurid duckbill. Dinosaur of Cretaceous Alberta, Western Canada. Royal Ontario Museum of Natural History. Skull is a profile plaque. Our precise skull can be used as a teaching tool, museum skull exhibit, home decor skull, or office decor skull.

Edmontosaurus annectens or Hadrosaurid duckbill was a species of flat-headed or saurolophine hadrosaurid ornithopod dinosaur (a “duck-billed dinosaur”) from the very end of the Cretaceous Period, in what is now North America. Remains of Edmontosaurus annectens have been preserved in the Frenchman, Hell Creek, and Lance Formations.

All of these formations are dated to the late Maastrichtian stage of the Late Cretaceous Period, representing the last three million years before the extinction of the dinosaurs 66 million years ago.

The skull and skeleton of Edmontosaurus annectens are well-known. Edward Drinker Cope estimated the length of one specimen as about 29 feet long, with a skull 3.87 feet long.

The skull of Edmontosaurus annectens or Hadrosaurid duckbill is known for its long, wide muzzle. The skull was longer and lower proportionally than in any other known hadrosaurid. The toothless portion of the anterior mandible was relatively longer than in any hadrosaur.

The extreme length and breadth did not appear until an individual reached maturity, so many specimens lack the distinctive shape. The bones surrounding the large openings for the nostrils formed deep pockets around the openings.

The eye sockets were rectangular and longer front to back than top to bottom, although this may have been exaggerated by postmortem crushing. The skull roof of Edmontosaurus annectens or Hadrosaurid duckbill was flat and lacked a bony crest, and the quadrate bone that formed the articulation with the lower jaw was distinctly curved.

The lower jaw was long and straight, lacking the downward curve and possessing a heavy ridge running its length. The predentary was wide and shovel-like. The ridge on the lower jaw may have reinforced the long, slender structure.

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Additional information

Weight 7 lbs
Dimensions 46 × 24 in
Edmontosaurus annectens Facts:

Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: †Ornithischia
Suborder: †Ornithopoda
Family: †Hadrosauridae
Subfamily: †Saurolophinae
Genus: †Edmontosaurus
Species: †E. annectens
Binomial name: †Edmontosaurus annectens
Conservation Status: Extinct