What is "glyptodonts"

Usage examples of "glyptodonts".

Yet today, pteranodons and gomphotheres and glyptodonts did not appeal.

There were still glyptodonts, not so dissimilar from the huge armored beast that had terrified Roamer, and the top predators were giant flightless birds, just as in archaic times.

And it had been weirdly appropriate for the setting—as much so as the vanished saber-tooths that had perished with the glyptodonts and mastodons not long after the first humans came through this way.