Mammuthus planifrons and Mammuthus meridionalis had 12 and 14 ridges on their molars, while the Wooly Mammoth (Mammuthus primigenius) had 27 such ridges, probably because of its extreme browsing diet.

Stegodon evolved into Primelephas , which is ancestor of the extinct genus of Mammoths and two recent genus of elephants, Loxodonta and Elephas

Mastodon molars were low-crowned and fairly small and had three or four prominent transverse ridges of enamel. Mastodons have fewer ridges on their molar teeth than elephants and the ridges are also less elevated.