Martharaptor was a therizinosaur theropod dinosaur which lived in Utah during the early Cretaceous Period approximately 135-132 million years ago. Therizinosaurs are known mostly from the middle and later parts of the Cretaceous Period. Fossils dating to the early Cretaceous… Read More ›
North America
Cedrorestes
Cedrorestes, which means “Cedar Mountain dweller”, was an ornithopod dinosaur which lived in Utah during the early Cretaceous Period. The fossils of this animal were discovered in eastern Utah in 2001. These were fragmentary remains consisting of pieces of ribs,… Read More ›
The Choristoderan of the Cedar Mountain Formation
The Cedar Mountain Formation of eastern Utah contains rock layers dated to the early and middle Cretaceous Period, approximately 144-95 million years ago. Most of the fossils found here belong to medium-sized and large-sized dinosaurs, while fossils belonging to smaller… Read More ›
Dimorphodon
Dimorphodon was a species of pterosaur that lived during the early Jurassic Period about 195-190 million years ago. It measured over 3 feet long from its nose to the end of its long tail (which may or may not have… Read More ›
Diplurus
Diplurus was a 3 foot long freshwater coelacanth fish which lived in the northeastern United States during the late Triassic and early Jurassic Periods, approximately 220-190 million years ago. It is divided into three species: D. longicaudatus, D. newarki, and… Read More ›
Anchisaurus
Anchisaurus was a prosauropod dinosaur whose fossils have been found in America’s northeastern states of Massachusetts and Connecticut within rocks dated to the beginning of the Jurassic Period, about 200-190 million years ago. Anchisaurus is one of the more well-known… Read More ›
Mierasaurus
Mierasaurus was a turiasaurian sauropod dinosaur which lived in Utah during the early Cretaceous Period approximately 139 to 136 million years ago. Mierasaurus lived during a time when the environment of prehistoric Utah became substantially wetter and more humid than… Read More ›
Hippodraco
Hippodraco, meaning “horse dragon” in a mixture of ancient Greek and Latin, was an ornithopod dinosaur which lived in western North America during the early Cretaceous Period. The fossils were found by Andrew R. C. Milner in 2004 in east-central… Read More ›
Falcarius
Falcarius was a 12 foot long theropod dinosaur which lived in Utah during the early Cretaceous Period, approximately 139 to 136 million years ago. It was a very primitive therizinosaur – so primitive that it still bears a close resemblance… Read More ›
Utahraptor: A History
The reconstructed skull of Utahraptor, on display in Brigham Young University’s Museum of Paleontology. Photo by Jaren Wilkey of Brigham Young University (January 26, 2018). Creative Commons Attribution-Share Alike 4.0 International license.https://commons.wikimedia.org/wiki/File:BYU_Utahraptor_skull.jpg. Introduction Within the American West, you don’t need to travel… Read More ›