Edmontosaurus Annectens

Edmontosaurus annectens is 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 E. 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 (between 66.8 to 65 million years ago). Edmontosaurus annectens is known from numerous specimens, including at least twenty partial to complete skulls, discovered in the U.S. states of Montana, South Dakota and Wyoming, and the Canadian province of Saskatchewan. It was a large animal, up to approximately 12 metres (39 ft) in length, with an extremely long and low skull. E. annectens exhibits one of the most striking examples of the "duckbill" snout common to hadrosaurs. It has a long taxonomic history that includes the genera Anatosaurus, Anatotitan, Claosaurus, Diclonius, Thespesius, and Trachodon.

Read more about Edmontosaurus Annectens:  Description, Classification, Discovery and History, Paleoecology, Paleobiology

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Edmontosaurus Annectens - Paleobiology - Growth
... Their results showed that within both recognized Edmontosaurus species, many features previously used to classify additional species or genera were directly ... these results as strongly suggesting that the shape of Edmontosaurus skulls changed dramatically as they grew ... annectens subadults, and Anatotian copei fully mature adults ...
Hell Creek Formation - Ornithischians - Ornithopods
... annectens Reclassified as Edmontosaurus annectens Anatotitan A ... copei Junior synonym of Edmontosaurus annectens Bugenasaura B ... annectens Edmontosaurus E ...
Lance Formation - Paleontology - Ornithischia - Ornithopods
... annectens Reclassified as Edmontosaurus annectens Anatotitan A ... hadrosaurid, probably synonymous with Edmontosaurus annectens Claosaurus C ... annectens Reclassified as Edmontosaurus annectens Edmontosaurus E ...
Edmontosaurus Annectens - Discovery and History - Anatosaurus To The Present
... around the American Museum duckbills, Marsh's Claosaurus annectens, and several other species by creating a new generic name ... Greek sauros = lizard) and made Marsh's species the type species, calling it Anatosaurus annectens ... annectens, was actually a species of Edmontosaurus, and that A ...