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In Central and South America alligators are represented by five species of the genus Caiman, which differs from Alligator by the absence of a bony septum between the nostrils, and the ventral armour is composed of overlapping bony scutes, each of which is formed of two parts united by a suture.
The largest, attaining an enormous bulk and a length of 20 ft., is the C. niger, the jacare-assu or large caiman of the Amazons.
Caiman, Central and South America.
The largest of the Amazon species are the jacare-assu (Caiman niger), jacare (C. fissipes) and jacaretinga (C, sclerops).