All modern amphibians—frogs, toads, salamanders, and the legless caecilians—belong to the same subclass of animals known as the Lissamphibia.

所有现代两栖动物——青蛙、蟾蜍、火蜥蜴和无腿的盲肠动物——都属于被称为 Lissamphibia 的同一动物亚纲。

One popular hypothesis holds that, while frogs and salamanders evolved from dissorophoids, caecilians descended from a different group of amphibians.

一个流行的假设认为， 虽然青蛙和火蜥蜴是从异食动物进化而来的，但蚓螈是从另一类两栖动物进化而来的。