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Caiman
A caimán is an alligatorid crocodilian belonging to the subfamily Caimaninae, one of two primary lineages within Alligatoridae, the other being alligators.
==Description==
Caimans inhabit Central and South America. They are relatively mid-small sized crocodilians, with the smallest being Cuvier's dwarf caiman (''Paleosuchus palpebrosus''), which grows to 1 m (3 ft) long, and the largest being the black caiman (''Melanosuchus niger''), which can grow to 5 m (15 ft) or more. Caimans are distinguished from alligators, their closest (and more widely-known) relatives, by a few defining features: a lack of a bony septum between the nostrils, ventral armor composed of overlapping bony scutes formed from two parts united by a suture, and relatively longer, more slender teeth than those that alligators possess. Several extinct forms are known, including ''Purussaurus'', a giant Miocene genus that grew to and the equally large ''Mourasuchus'', which had a wide duck-like snout.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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