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Oxytropidoceras posted a topic in Fossil NewsWeird reptile-like mammal species discovered amid ancient Utah dinosaur bones by David DeMille, USA Today, The Spectrum, May 30, 2018 https://www.usatoday.com/story/news/nation-now/2018/05/30/reptile-mammal-species-fossil-utah-pangea/654547002/ Scientists discover the fossilized skull of a mammal-like critter under a dinosaur’s foot in Utah — and then it gets even weirder, The Salt Lake Tribune, May 30, 2018 https://www.sltrib.com/news/education/2018/05/29/scientists-discover-the-fossilized-skull-of-a-mammal-like-critter-under-a-dinosaurs-foot-in-utah-and-then-it-gets-even-weirder/ Why you should care about this 130-million-year-old fossil The ancient find, unearthed in Utah, bridges the transition from reptiles to the beginning of mammals and changes our view of continental drift, too By Zen Vuong, USC News, May 23, 2018 https://news.usc.edu/143411/why-you-should-care-about-this-130-million-year-old-fossil/ The this paper is: Adam K. Huttenlocker; David M. Grossnickle; James I. Kirkland; Julia A. Schultz; Zhe-Xi Luo (2018). "Late-surviving stem mammal links the lowermost Cretaceous of North America and Gondwana". Nature. in press. doi:10.1038/s41586-018-0126-y. Yours, Paul H.
Trapped in an 18,000-pound block of quicksand now turned to stone is a hidden treasure of well-preserved Utahraptor fossils. Utahraptor ostrommaysorum is a large (around five meters or 18 feet long), feathered, predatory theropod dinosaur from Utah’s early Cretaceous (~124 million years ago). Utahraptors sported huge sickle claws on their second toes, with the largest specimen measuring at 22 cm (8.7”) long. Utahraptor is a dromaeosaurid dinosaur — popularly called “raptors” based on the Jurassic Park movie franchise shorthand for it's sickle-clawed stars. The illustration below shows the suspected setting for the origin of this amazing fossil block. Bones of an iguanodontid dinosaur that was also believed to have gotten mired in quicksand. So far bones from perhaps six individual Utahraptors have been found and they think were attracted to the quicksand mire by the easy prey and we're trapped. This block could provide evidence for pack hunting behavior in Utahraptors Funding is required to keep the project moving The setting, Utahs badlands the Cedar Mountain Formation initial discovery Sickle Claw visible More initial discoveries Jaw fragment Dentary Utahraptor Project Link to learn much more about what is going on. http://utahraptors.utahpaleo.org/#gallery
A new specimen of Eolambia caroljonesa is described in this new paper. It's the most abundant dinosaur in the Cedar Mountain Formation of Utah. Osteology of the Basal Hadrosauroid Eolambia caroljonesa (Dinosauria: Ornithopoda) from the Cedar Mountain Formation of Utah Andrew T. McDonald , John Bird, James I. Kirkland, Peter Dodson http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0176896 Nice photo of a theropod provisionally called Siats meekerorum which was found in the vicinity of the E. Caroljonesa