Notohypsilophodon (meaning "southern Hypsilophodon") is a genus of euornithopod dinosaur from the Late Cretaceous of Argentina. It was described as the only "hypsilophodont" known from South America, although this assessment is not universally supported, and Gasparinisaura is now believed to have been a basal euornithopod as well.
History of discovery[]
The holotype specimen was discovered near the village of Buen Pasto in the Chubut province of Argentina in the Bajo Barreal Formation of the San Jorge Basin. The holotype specimen was a partial skeleton that included several vertebrae from the neck, back, hip, and tail, parts of the shoulder, some rib fragments, a right humerus, both ulnae, most of the left leg, a right fibula and astragalus, and several phalanges. Because the neural arches were not fused to the bodies of the vertebrae, the describer interpreted the individual as being a juvenile.
Description[]
Like most basal ornithopods Notohypsilophodon was a bipeadal herbivore. While it was not given a size estimation in the article that initially described it, in the 2010 book, The Princeton Field Guide to Dinosaurs, Gregory S. Paul gave a size estimation of a length of 1.3 meters (4.3 ft), and a weight of 6 kilograms (13 lbs).
Phylogeny[]
When it was first described Notohypsilophodon was placed in the family Hypsilophodontidae. In 2015 Notohysilophodon was assigned to the clade Elasmaria, along with other basal ornithopods from Antarctica and Patagonia such as Leaellynasaura, Gasparinisaura, and Morrosaurus.
References[]
https://www.sciencedirect.com/science/article/abs/pii/S0195667115300677?via%3Dihub
Gallery[]
