Difference between Mastodon and Mastodont

What is the difference between Mastodon and Mastodont?

Mastodon as a noun is extinct elephant-like mammal of the genus mammut that flourished worldwide from miocene through pleistocene times; differs from elephants and mammoths in the form of the molar teeth. while Mastodont as a noun is mastodon

We hope you now know whether to use Mastodon or Mastodont in your sentence.