 "Arizonerpeton" is known exclusively from a collection of unusual vertebrae collected by Robert Wells, the namesake of its specific name.These vertebrae can be designated as belonging to the order Nectridea, a collection of long-tailed tetrapods (amphibians in the broad sense) also including the famous "boomerang-headed" "Diplocaulus".Like other nectrideans, "Arizonerpeton's" vertebrae had a single main body (a pleurocentrum) fused to a plate-like neural spine jutting out of the top.