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An alligator, or colloquially gator, is a large reptile in the genus Alligator of the family Alligatoridae in the order Crocodilia. The two extant species are the American alligator (A. mississippiensis) and the Chinese alligator (A. sinensis). Additionally, several extinct species of alligator are known from fossil remains.
An alligator nest at Everglades National Park, Florida, United States Spectacled caiman head Black caiman, Jauaperi River, Amazonia Head of smooth-fronted caiman. Family Alligatoridae. Subfamily Alligatorinae. Genus Alligator † Alligator hailensis † Alligator mcgrewi † Alligator mefferdi; Alligator mississippiensis, American alligator ...
The American alligator was first classified in 1801 by French zoologist François Marie Daudin as Crocodilus mississipiensis.In 1807, Georges Cuvier created the genus Alligator for it, [14] based on the English common name alligator (derived from Spanish word el lagarto, "the lizard").
Alligatorinae is cladistically defined as Alligator mississippiensis (the American alligator) and all species closer to it than to Caiman crocodylus (the spectacled caiman). [ 8 ] [ 9 ] This is a stem-based definition for Alligatorinae, and means that it includes more basal extinct alligator ancestors that are more closely related to living ...
Three extant crocodilian species clockwise from top-left: saltwater crocodile (Crocodylus porosus), American alligator (Alligator mississippiensis), and gharial (Gavialis gangeticus) Crocodilia is an order of mostly large, predatory, semiaquatic reptiles, which includes true crocodiles, the alligators, and caimans; as well as the gharial and ...
Caimaninae is cladistically defined as Caiman crocodylus (the spectacled caiman) and all species closer to it than to Alligator mississippiensis (the American alligator). [ 8 ] [ 9 ] This is a stem-based definition for caimaninae, and means that it includes more basal extinct caimanine ancestors that are more closely related to living caimans ...
Crocodiles (family Crocodylidae) or true crocodiles are large, semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia.The term “crocodile” is sometimes used more loosely to include all extant members of the order Crocodilia, which includes the alligators and caimans (both members of the family Alligatoridae), the gharial and false gharial (both ...
An alligator nest at Everglades National Park, Florida, United States Alligator olseni forelimb Alligator prenasalis fossil. The superfamily Alligatoroidea is thought to have split from the crocodile-gharial lineage in the late Cretaceous, about 80 million years ago, but possibly as early as 100 million years ago based on molecular phylogenetics.