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Saurian dakotaraptor animation9/23/2023 ![]() ![]() regalis, but some well-preserved examples have been studied, including one which preserves a soft tissue crest or wattle on the head. Skin impressions are less well known for E. Because of these finds, the scalation of Edmontosaurus annectens is known for most areas of the body. Several have been well-publicized, such as the " Trachodon mummy" of the early 20th century, and the specimen nicknamed "Dakota", the latter apparently including remnant organic compounds from the skin, a hoof-like structure in the front feet, as well as what appears to be color pattern preservation, in the form of a striped pattern in the arm's joints. Multiple specimens of Edmontosaurus annectens have been found with preserved skin impressions. The animal's feeding range would have been from ground level to around 4 metres (13 ft) above. However, the presence of cheeks in ornithischian dinosaurs is highly debatable, and their presence or lack thereof might have not been universal to all ornithischians. The function of the cheeks would have been to retain food in the mouth since it would have to chew and would not swallow like other dinosaurs. Because the tooth rows are deeply indented from the outside of the jaws, and because of other anatomical details, it is inferred that Edmontosaurus and most other ornithischians could have had cheek-like structures. It used its broad beak to cut loose food, perhaps by cropping, or by closing the jaws in a clamshell-like manner over twigs and branches and then stripping off the more nutritious leaves and shoots. ![]() Its teeth were continually replaced and packed into dental batteries that contained hundreds of teeth, only a relative handful of which were in use at any time. It was a large animal, up to approximately 12 metres (39 ft), potentially up to 15 m (49 ft) in length, with an extremely long and low skull and a proportionally massive tail which is characteristic with most duck billed dinosaurs.Īs a hadrosaurid, Edmontosaurus was a large terrestrial herbivore. states of Montana, South Dakota, North Dakota, Wyoming, Colorado, Alaska and the Canadian provinces of Saskatchewan, Alberta, Yukon, Manitoba, Northwest Territories, and British Columbia showing it was wide spread and successful. Edmontosaurus annectens is known from numerous specimens, including at least twenty partial to complete skulls, discovered in the U.S. All of these formations are dated to the late Maastrichtian stage of the Late Cretaceous Period, representing the last two million years before the extinction of the dinosaurs (between 68 and 66 million years ago). annectens have been preserved in the Frenchman, Hell Creek, Laramie and Lance Formations. ![]()
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