Terragen vertebrate animals that spend the early part of their life cycle in water breathing through gills, but usually live on land as air-breathing adults. They include frogs, toads, newts, salamanders, caecilians, labyrinthodonts, and a number of other forms. The term may also be used to refer to equivalent xenobionts.
- Frog - Text by M. Alan Kazlev
Monophyletic taxon; small tailless terragen amphibian with long legs adapted for leaping, Order Anura. Important component of a number of terragen wetland and pond-based ecosystems. Distinctive croaking mating call. They start out as gilled, swimming tadpoles, but grow to be air-breathing, hopping adults. There have been a number of successful frog provolves , especially since the early Empires Age. Among the most important frog clades are the Bufos and the Turo-ro Singers. However, most frogs remain today as subsapient sentient animal life forms.