The same species in other parts of North America normally goes through the metamorphosis, like other species of the Urodela.
"Hormones and Heredity"
J. T. Cunningham
The larva of the Urodela is probably more primitive than the tadpole of the Frogs and Toads, and in the former the legs develop while the external gills are still large, long before the animal leaves the water.
"Hormones and Heredity"
J. T. Cunningham