What Did Axolotls Evolve From?

Axolotls are very interesting creature that have millions of years of evolution behind them. Axolotls most recent evolution was from a tiger salamander larva. these two species went through a divergent evolution and create two different species. let me explain how. the axolotl and a tiger salamander larva are almost identical, the only difference is a tiger salamander will go through metamorphosis while an axolotl will not. Another way to tell that the axolotl has evolved from the tiger salamander is by looking at their homologous structures. A tiger salamander larva and an axolotl have a lot in common such as their external gills, five digits on the rear legs and for digits on the front legs, and their body structure. There is no perfect theory on how the axolotl evolved from the tiger salamander, but the most popular belief is it happened through some kind of environmental factor that did not allow the larva to morph into the salamander, so they Adapted and learned how to live their entire lives in the water and breed which eventually lead to speciation. It is also believed that most amphibians including the tiger salamander and the axolotl evolved from a crossopterygian. This is a type of lobe-fined, boney fish such as the coelacanths that first appeared in the beginning of the Devonian period (about 416 million years ago).