Description
Mastodon, any of several extinct elephantine mammals (family Mastodontidae, genus Mastodon [also called Mammut]) that first appeared in the early Miocene and continued in various forms through the Pleistocene Epoch (from 2.6 million to 11,700 years ago). In North America, mastodons probably persisted into post-Pleistocene time and were thus contemporaneous with historic North American Indian groups. Mastodons had a worldwide distribution; their remains are quite common and are often very well preserved.
Encyclopædia Britannica, Inc.
A characteristic feature of the mastodons, which appear to have fed upon leaves, is the distinctive nature of the grinding teeth, which in many respects are relatively primitive. They are low-crowned, large, and strongly rooted, with as many as four prominent ridges separated by deep troughs; the teeth are much smaller and less complex, however, than those in the true elephants. The prominent upper tusks were long and grew parallel to each other with an upward curvature. Short lower tusks were present in males but absent in females.
Mastodons were shorter than modern elephants but were heavily built. Although the skull was lower and flatter and of generally simpler construction than that of the modern elephants, it was similar in appearance. The ears were smaller and not as prominent as those of elephants. The body was relatively long, and the legs were short, massive, and pillarlike. Mastodons were covered with long, reddish brown hair. The reasons for their extinction are not certain, but, in North America at least, human hunting may have played a role.
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