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    Crocodile - Wikipedia

    • 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 gh… See more

    Etymology

    The word crocodile comes from Ancient Greek κροκόδιλος (krokódilos) 'lizard', used in the phrase ho krokódilos tou potamoú, 'the lizard of the (Nile) river'. There are several variant Greek forms of the word attested, in… See more

    Taxonomy and phylogeny

    Crocodylidae was named as a family by Georges Cuvier in 1807. It belongs to the larger superfamily Crocodyloidea, which also includes additional extinct crocodile relatives. These all belong to the order Crocodilia, … See more

    Characteristics

    A crocodile's physical traits allow it to be a successful predator. Its external morphology is a sign of its aquatic and predatory lifestyle. Its streamlined body enables it to swim swiftly; it also tucks its feet to the side while swimming, … See more

    When did crocodiles first appear?
    The Crocodylia is an order of mostly large, predatory, semiaquatic reptiles. Their ancestors, the clade Pseudosuchia, appeared about 250 million years ago in the early Triassic period. Crocodiles as we know them first appeared 94 million years ago in the Upper Cretaceous period.
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    Etymology
    Taxonomy and phylogeny
    Characteristics
    When did crocodiles first appear?
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