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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.
Alligators and caimans split in North America during the early Tertiary or late Cretaceous (about 53 million to 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 largest known fossil hyena is Pachycrocuta, estimated at 90–100 cm (35–39 in) at the shoulder [193] and 190 kg (420 lb) weight. [42] Another huge hyena with mass over 100 kg (220 lb) is the cave hyena. It is actually a subspecies of the African spotted hyena, which is at 10% smaller than the extinct cave hyena. [194]
A fictional Muppet alligator who chases Bernie the Agent in Kermit's swamp. Later appeared as a talking alligator in Kermit's Swamp Years. Daisy An Alligator Named Daisy: 1955 J. Lee Thompson: A young man's life is complicated by the inheritance of an alligator. [21] Ramon Alligator: 1980 Lewis Teague: A mutated American alligator from the ...
The Chinese alligator split from the American alligator about 33 million years ago [8] and likely 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. [9] The alligator's full mitochondrial genome was sequenced in the 1990s. [10]
Between the two fences that separate Reggie's enclosure from the public is a sign with the thumbnail version of his remarkable journey to the Los Angeles Zoo 15 years ago today. Some visitors stop ...
This is a list of characters in The Land Before Time, a series of animated feature films and a television series. The main characters include Littlefoot ( Apatosaurus [ 1 ] ), Cera ( Triceratops [ 2 ] ), Ducky ( Saurolophus [ 3 ] ), Petrie ( Pteranodon [ 4 ] ), Spike ( Stegosaurus [ 5 ] ), and in the spin-off television series and the ...
The origin of the reptiles lies about 310–320 million years ago, in the steaming swamps of the late Carboniferous period, when the first reptiles evolved from advanced reptiliomorphs. [21] [failed verification] The oldest known animal that may have been an amniote is Casineria (though it may have been a temnospondyl).