Which vertebrate class is considered to be the first that was entirely terrestrial?

Question

Biology

Tania Gay

20 January, 17:21

Which vertebrate class is considered to be the first that was entirely terrestrial?

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Answers (2)

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Braelyn Bell · Answer 1

Reptilia.

Reptiles were the first animals to develop shelled eggs, meaning they could be laid on land rather than in water as is necessary for the shell-less eggs of amphibians and fish. They also developed dry, scaly skin to prevent the moisture loss amphibians experience through their moist, permeable skins when on land.

Larissa Hodge · Answer 2

The first entirely terrestrial vertebrate class totally independent from the aquatic habitat is the class reptilia.