Vtech 80-122400 Switch & Go Dinos - Horns the Triceratops, Ages 3-8

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Dodson, P.; Currie, P. J. (1990). "Neoceratopsia". In Weishampel, D. B.; Dodson, P.; Osmólska, H. (eds.). The Dinosauria. Berkeley: University of California Press. pp.593–618. ISBN 978-0-520-06727-1. a b c d e Kielan-Jaworowska, Zofia; Cifelli, Richard L.; Luo, Zhe-Xi (2004). Mammals from the Age of Dinosaurs: Origins, Evolution, and Structure. New York: Columbia University Press. pp.98–99. ISBN 978-0-231-11918-4.

The skull also featured a pair of supraorbital "brow" horns approximately 1 meter (3.3ft) long, with one above each eye. [32] [33] The jugal bones pointed downward at the rear sides of the skull and were capped by separate epijugals. With Triceratops, these were not particularly large and sometimes touched the quadratojugals. The bones of the skull roof were fused and by a folding of the frontal bones, a "double" skull roof was created. In Triceratops, some specimens show a fontanelle, an opening in the upper roof layer. The cavity between the layers invaded the bone cores of the brow horns. [31] 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. Derstler, K. (1994). "Dinosaurs of the Lance Formation in eastern Wyoming". In Nelson, G. E. (ed.). The Dinosaurs of Wyoming. Wyoming Geological Association Guidebook, 44th Annual Field Conference. Wyoming Geological Association. pp.127–146. As described above, Scannella had argued in 2010 that Nedoceratops should be considered a synonym of Triceratops. [29] Farke (2011) maintained that it represents a valid distinct genus. [88] Longrich agreed with Scannella about Nedoceratops and made a further suggestion that the recently described Ojoceratops was likewise a synonym. The fossils, he argued, are indistinguishable from the Triceratops horridus specimens that were previously attributed to the defunct species Triceratops serratus. Mortal Enemies – Many people falsely picture most “famous” dinosaurs living in the same time. However, Brachiosaurus never faced off with Tyrannosaurus, but Triceratops did. These two lived in the same ecosystem at the same time, and likely interacted with one another.Weishampel, D. B. (1984). Evolution of jaw mechanisms in ornithopod dinosaurs. Advances in Anatomy Embryology and Cell Biology. Vol.87. pp.1–110. doi: 10.1007/978-3-642-69533-9. ISBN 978-3-540-13114-4. PMID 6464809. S2CID 12547312. Norman, David (1985). The Illustrated Encyclopaedia of Dinosaurs. London: Salamander Books. ISBN 978-0-517-46890-6. a b Paul, G. S. (2010). The Princeton Field Guide to Dinosaurs. Princeton University Press. pp. 265–267. ISBN 978-0-691-13720-9. Evans, D. C.; Larson, D. W.; Currie, P. J. (2013). "A new dromaeosaurid (Dinosauria: Theropoda) with Asian affinities from the latest Cretaceous of North America". Naturwissenschaften. 100 (11): 1041–1049. Bibcode: 2013NW....100.1041E. doi: 10.1007/s00114-013-1107-5. PMID 24248432. S2CID 14978813. Tanke, D. H.; Farke, A. A. (2006). "Bone resorption, bone lesions, and extracranial fenestrae in ceratopsid dinosaurs: a preliminary assessment". In Carpenter, K. (ed.). Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs. Bloomington: Indiana University Press. pp.319–347. ISBN 978-0-253-34817-3.

Tait, J.; Brown, B. (1928). "How the Ceratopsia carried and used their head". Transactions of the Royal Society of Canada. 22: 13–23. Skull of specimen DMNH 48617 from the Laramie Formation of eastern Colorado. Based on the age of the formation, it may be the oldest Triceratops known. Triceratops fossils have typically been discovered as solitary individuals. But in a 2009 article in the Journal of Vertebrate Paleontology, scientists reported the first discovery of a Triceratops"bonebed," which contained three juvenile remains together and suggested a gregarious (and possibly herding) nature to the dinosaurs. Goodwin, M.B.; Clemens, W.A.; Horner, J.R. & Padian, K. (2006). "The smallest known Triceratops skull: new observations on ceratopsid cranial anatomy and ontogeny" (PDF). Journal of Vertebrate Paleontology. 26 (1): 103–112. doi: 10.1671/0272-4634(2006)26[103:TSKTSN]2.0.CO;2. ISSN 0272-4634. S2CID 31117040. Archived from the original (PDF) on November 5, 2015 . Retrieved January 21, 2007. Dinosaur games frequently crossover with other popular game types. Destruction and survival games are a common crossover theme with many dinosaur games. There's also lighter retro-style platform games.

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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] Scannella, John B.; Fowler, Denver W.; Goodwin, Mark B.; Horner, John R. (July 15, 2014). "Evolutionary trends in Triceratops from the Hell Creek Formation, Montana". Proceedings of the National Academy of Sciences. 111 (28): 10245–10250. Bibcode: 2014PNAS..11110245S. doi: 10.1073/pnas.1313334111. ISSN 0027-8424. PMC 4104892. PMID 24982159.