GENUINE ALLIGATOR HEAD

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Most of the muscle in an alligator's jaw evolved to bite and grip prey. The muscles that close the jaws are powerful, but the muscles for opening their jaws are weak. As a result, an adult human can hold an alligator's jaws shut bare-handed. It is common to use several wraps of duct tape to prevent an adult alligator from opening its jaws when being handled or transported. [32] Like other crocodilians, alligators have an armor of bony scutes. The dermal bones are highly vascularised and aid in calcium balance, both to neutralize acids while the animal cannot breathe underwater [54] and to provide calcium for eggshell formation. [55] Oaks, J.R. (2011). "A time-calibrated species tree of Crocodylia reveals a recent radiation of the true crocodiles". Evolution. 65 (11): 3285–3297. doi: 10.1111/j.1558-5646.2011.01373.x. PMID 22023592. S2CID 7254442.

International Food Information Service (2009). IFIS Dictionary of Food Science and Technology. John Wiley & Sons. p.15. ISBN 978-1-4051-8740-4.The name "alligator" is likely an anglicized form of el lagarto, the Spanish term for "the lizard", which early Spanish explorers and settlers in Florida called the alligator. [2] Early English spellings of the name included allagarta and alagarto. [3] Evolution Alligator mississippiensis". alligatorfur.com. Archived from the original on 2016-03-05 . Retrieved 2016-05-01. Alligators and caimans split in North America during the early Tertiary or late Cretaceous (about 53 million to about 65 million years ago). [4] [5] The Chinese alligator split from the American alligator about 33 million years ago [4] and probably descended from a lineage that crossed the Bering land bridge during the Neogene. The modern American alligator is well represented in the fossil record of the Pleistocene. [1] The alligator's full mitochondrial genome was sequenced in the 1990s. [6] The full genome, published in 2014, suggests that the alligator evolved much more slowly than mammals and birds. [7] Phylogeny a b c d e f g h i Britton, Adam. "FREQUENTLY ASKED QUESTIONS: What's the difference between a crocodile and an alligator?". Crocodilian Biology Database. Archived from the original on 11 October 2012 . Retrieved 18 September 2017.

The genus Alligator belongs to the subfamily Alligatorinae, which is the sister taxon to Caimaninae (the caimans). Together, these two subfamilies form the family Alligatoridae. The cladogram below shows the phylogeny of alligators. [8] [9] Alligatoridae American alligators are found in the southeast United States: all of Florida and Louisiana; the southern parts of Georgia, Alabama, and Mississippi; coastal South and North Carolina; East Texas, the southeast corner of Oklahoma, and the southern tip of Arkansas. Louisiana has the largest alligator population. [20] The majority of American alligators inhabit Florida and Louisiana, with over a million alligators in each state. Southern Florida is the only place where both alligators and crocodiles live side by side. [21] [22] Grigg, Gordon; Kirshner, David (2015). Biology and Evolution of Crocodylians. CSIRO Publishing. ISBN 9781486300662.The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species . Retrieved 2018-10-25. Fish, Frank E.; Bostic, Sandra A.; Nicastro, Anthony J.; Beneski, John T. (2007). "Death roll of the alligator: mechanics of twist feeding in water". The Journal of Experimental Biology. 210 (16): 2811–2818. doi: 10.1242/jeb.004267. PMID 17690228. S2CID 8402869. a b Brochu, C.A. (1999). "Phylogenetics, taxonomy, and historical biogeography of Alligatoroidea". Memoir (Society of Vertebrate Paleontology). 6: 9–100. doi: 10.2307/3889340. JSTOR 3889340. Kaku, Michio (March 2011). Physics of the Future: How Science Will Shape Human Destiny And Our Daily Lives by the Year 2100. Doubleday. pp.150, 151. ISBN 978-0-385-53080-4.