- True Toad
Amphibians were the first vertebrates to establish themselves on land. First appearing 360 million years ago, they evolved directly from lobe-finned fish. They are cold blooded, have moist skin, and lack scales or claws.
Classification – Amphibians
There are three orders of Amphibia: the limbless caecilians that resemble earthworms, salamanders that have cylindrical bodies, distinct heads, and well-developed limbs e.g. newts; and the Anura, or frogs and toads. Anura means lacking a tail. The anurans differ by having stout bodies, no tail, and a continuous head and body.