There isn't any. The simple separation of land and water vertebrates answers that question. Also, how specific are you tying to be, because mammals as a group can live pretty much anywhere, with a few exceptions of some more extreme environments. The only group of organisms capable of living in every known environment are Archaea, which are single celled prokaryotic organisms, but not vertebrates.
Penguins belong to a vertebrate group called aves.
Starfish are not in a vertebrate group because they do not have vertebrae.
The vertebrate group of rats is the order: Rodentia.
Amphibians are the vertebrate group that epipedobates tricolor in.
The vertebrate group megadyptes antipodes are in is mammals.
The Pelochelys cantorii vertebrate group is "Reptile."
An ambystoma mexicanum is an axolotl, of the vertebrate group amphibians.
vertebrate
The Cryptobranchus Alleganiensis belongs to the Amphibian Vertebrate group
An Axolotl is like a type of salamander so it is in the Amphibian vertebrate group :)
They have a backbone, classifying them as a vertebrate.
Vertebrate and In-Vertebrate