Question

1. Which one lived in Antarctica earlier , the the labyrinthodont, the lystrosaurus, or the duck-billed dinosaur? Explain.

Answer 1

Labyrinthodont Lived First...
Did dinosaurs once lived on antarctica?Absolutely! A theropod dinosaur named Cryolophosaurus (frozen crested lizard)
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Answer 2

Answer is labyrinthodont

About 110 million years ago, labyrinthodonts ( maze-toothed), a group of extinct amphibians. They were evolved from lobed-finned fish in the Devonian period. They were dominant animals in the rift valley was present at that time between Antarctica and Australia.