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Little Tikes Chompin' Dino Trike - Interactive Dinosaur Ride-on Toy With Sounds & More - Tough & Durable - Encourages Active & Imaginative Play - For Kids Ages 3 Years Plus

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Gauthier, J. A. (1986). "Saurischian monophyly and the origin of birds. The Origin of Birds and the Evolution of Flight, K. Padian (ed.)". Memoirs of the California Academy of Sciences. 8: 1–55. It can be inferred that the triceratops is one of the New Legion's main mounts since they compliment Nerva's strategies that are related to Roman battle formations with their frills as living shields.

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This article originally appeared on The Conversation, and is republished under a Creative Commons licence. Sereno, P. C. (1998). "A rationale for phylogenetic definitions, with application to the higher-level taxonomy of Dinosauria". Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 210 (1): 41–83. doi: 10.1127/njgpa/210/1998/41. There has been much speculation over the functions of Triceratops ' head adornments. The two main theories have revolved around use in combat and in courtship display, with the latter now thought to be the most likely primary function. [31]a b Archibald, J. D.; Zhang, Y.; Harper, T.; Cifelli, R. L. (2011). "Protungulatum, Confirmed Cretaceous Occurrence of an Otherwise Paleocene Eutherian (Placental?) Mammal". Journal of Mammalian Evolution. 18 (3): 153–161. doi: 10.1007/s10914-011-9162-1. S2CID 16724836. The pair claim that their new rate of impact is consistent with the age of Chicxulub, providing a satisfactory explanation for its origin and other impactors like it. Understanding Chicxulub impactor is not just crucial to solving a mystery of Earth’s history but could prove pivotal if such an event were to threaten the planet again, contends Avi Loeb, Frank B. Baird Jr. Professor of Science at Harvard. Kris Snibbe/Harvard file photo Early on, Lull postulated that the frills may have served as anchor points for the jaw muscles to aid chewing by allowing increased size and power for the muscles. [63] This has been put forward by other authors over the years, but later studies do not find evidence of large muscle attachments on the frill bones. [64]

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Lull, R. S., & Wright, N. E. (1942). Hadrosaurian dinosaurs of North America(Vol. 40). Geological Society of America. The researchers used computer modeling techniques that accounted for uncertainties including incomplete fossil records to converge on the most probable result. Wall, Michael (January 27, 2009). "Scars Reveal How Triceratops Fought –". Wired. Archived from the original on January 12, 2014 . Retrieved August 3, 2010.a b Lamanna, M. C.; Sues, H. D.; Schachner, E. R.; Lyson, T. R. (2014). "A New Large-Bodied Oviraptorosaurian Theropod Dinosaur from the Latest Cretaceous of Western North America". PLOS ONE. 9 (3): e92022. Bibcode: 2014PLoSO...992022L. doi: 10.1371/journal.pone.0092022. PMC 3960162. PMID 24647078. Hone, D. W. E.; Naish, D. (2013). "The 'species recognition hypothesis' does not explain the presence and evolution of exaggerated structures in non-avialan dinosaurs". Journal of Zoology. 290 (3): 172–180. doi: 10.1111/jzo.12035. It threw all of this material out of the tub onto the river bank and mixed into it other materials still raining down.”

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a b Ostrom, J. H. (1966). "Functional morphology and evolution of the ceratopsian dinosaurs". Evolution. 20 (3): 290–308. doi: 10.2307/2406631. JSTOR 2406631. PMID 28562975.We looked at the six most abundant dinosaur families through the whole of the Cretaceous (period), spanning from 150 to 66 million years ago, and found that they were all evolving and expanding and clearly being successful,” said study lead author, Fabien Condamine, a researcher from the Institut des Sciences de l’Evolution de Montpellier in France in a news release. Happ, J. (2008). "An analysis of predator-prey behavior in a head-to-head encounter between Tyrannosaurus rex and Triceratops". In Larson, P.; Carpenter, K. (eds.). Tyrannosaurus rex, the Tyrant King (Life of the Past). Bloomington: Indiana University Press. pp.355–368. ISBN 978-0-253-35087-9.

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