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

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Reid, R.E.H. (1997). "Histology of bones and teeth". In Currie, P. J.; Padian, K. (eds.). Encyclopedia of Dinosaurs. San Diego, CA.: Academic Press. pp.329–339.

Illies, M. M. Canoy; Fowler, D. W. (2020). " Triceratops with a kink: Co-ossification of five distal caudal vertebrae from the Hell Creek Formation of North Dakota". Cretaceous Research. 108: 104355. Bibcode: 2020CrRes.10804355C. doi: 10.1016/j.cretres.2019.104355. S2CID 214215413.

Distribution of the Triceratops

a b c d e f g h i Dodson, P. (1996). The Horned Dinosaurs. Princeton, New Jersey: Princeton University Press. ISBN 978-0-691-02882-8. Melbourne Museum acquires world's most complete triceratops skeleton in 'immense' dinosaur deal". the Guardian. December 2, 2020. Archived from the original on February 18, 2021 . Retrieved February 10, 2021. 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]

Frill Fight – Part of those communications likely included battles between Triceratops. Scientists call this interspecies conflict. Scientists have found Triceratops frills with holes in them that fit the size of other species’ horns. Because the holes showed signs of healing, they believe that the animals injured one another in battle over territory or breeding. 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] a b Bowdler, Neil (March 1, 2012). "Triceratops and Torosaurus dinosaurs 'two species, not one' ". BBC News. Archived from the original on March 15, 2013 . Retrieved July 29, 2013. Norman, David (1985). The Illustrated Encyclopaedia of Dinosaurs. London: Salamander Books. ISBN 978-0-517-46890-6. Torosaurus is a ceratopsid genus first identified from a pair of skulls in 1891, two years after the identification of Triceratops by Othneil Charles Marsh. The genus Torosaurus resembles Triceratops in geological age, distribution, anatomy, and size, so it has been recognised as a close relative. [86] Its distinguishing features are an elongated skull and the presence of two ovular fenestrae in the frill. Paleontologists investigating dinosaur ontogeny in Montana's Hell Creek Formation have recently presented evidence that the two represent a single genus.Martin, L. D.; Kurochkin, E. N.; Tokaryk, T. T. (2012). "A new evolutionary lineage of diving birds from the Late Cretaceous of North America and Asia". Palaeoworld. 21: 59–63. doi: 10.1016/j.palwor.2012.02.005. Many other horned dinosaurs are known to have lived in herds because of a fossil find of many different individuals at the same location. Dinosaurs roamed the earth for around 160 million years. Humans have lived for only 2.5 million. Isn't that crazy? These epic reptilian-like beasts inspired legendary characters like Godzilla and the much-loved Jurassic Park movie. Who knows what dinosaurs were really like? We can only imagine. Types of Dinosaur Games Campione, N. S. E.; Evans, D. C. (2011). "Cranial Growth and Variation in Edmontosaurs (Dinosauria: Hadrosauridae): Implications for Latest Cretaceous Megaherbivore Diversity in North America". PLOS ONE. 6 (9): e25186. Bibcode: 2011PLoSO...625186C. doi: 10.1371/journal.pone.0025186. PMC 3182183. PMID 21969872.