At first glance, it may appear that mammoths and mastodons were difficult to tell apart. If you take a second look, however, you can see that they had several clear differences. In fact, they evolved separately. Mastodons were also less abundant than mammoths in Florida.
Mastodons, unlike mammoths, had low skulls, and two pairs of tusks--thick upper ones and vestigial lower ones. Mastodons also had very different teeth than mammoths, with cone shaped cusps rather than a flat chewing surface. This shows that they were adapted to forest browsing, rather than grassland grazing like mammoths. The Warren mastodon was the largest species and could attain a height of over 10 feet at the shoulder.
What evidence remains of them? Mastodon teeth are not uncommon finds in the state of Florida, and the Wekiva river has turned up its fair share of these fossils. In fact, "Mastodon Springs" at Wekiva Falls Resort Campground was found to contain five separate largely intact mastodon and mammoth skeletons in 1990. This was a very rare and valuable find.
mastodon tooth found at Mastodon Springs, Wekiva Falls Resort Campground