An extinct genus of large mammals in the family Mammutidae, that fed by browsing on tall plants. Eurasian species died out three million years ago, but some specimens of the American Mastodon survived the last Ice Age.

Large mammals in the family Elephantidae, with columnar limbs, bulky bodies, and elongated snouts. They are the only surviving members of the PROBOSCIDEA MAMMALS.

General name for two extinct orders of reptiles from the Mesozoic era: Saurischia and Ornithischia.

Proteins obtained from species of REPTILES.

Remains, impressions, or traces of animals or plants of past geological times which have been preserved in the earth's crust.