are any of approximately 550 extant species of amphibians within the order Caudata
. They are typically characterized by a superficially lizard-like appearance, with slender bodies, short noses, and long tails. All known fossil salamanders and all extinct species fall under the order Caudata
, while sometimes the extant species are grouped together as the Urodela
. Salamanders have never more than four toes on their front legs and five on their rear legs, but some species have...