Complex sentence: In physical appearance, glyptodonts superficially resembled the much earlier dinosaurian ankylosaurs and, to a lesser degree, the recently extinct giant meiolaniid turtles of Australia, examples of the convergent evolution of unrelated lineages into similar forms.
Split into simpler sentences: In physical appearance, glyptodonts superficially resembled the much earlier dinosaurian ankylosaurs and, to a lesser degree, the recently extinct giant meiolaniid turtles of Australia. These are examples of the convergent evolution of unrelated lineages into similar forms.