The Temnospondyli (from Greek τέμνειν (temnein, `to cut`) and σπόνδυλος (spondylos, `vertebra`)) are a diverse order of small to giant tetrapods—often considered primitive amphibians—that flourished worldwide during the Carboniferous, Permian, and Triassic periods. A few species continued into the Cretaceous. Fossils have b... Found on http://en.wikipedia.org/wiki/Temnospondyli
(from the article `amphibian`) ...LoxommatoideaCarboniferous; Europe and North America.Order TemnospondyliEarly Carboniferous (360–320 million years ago) to Late Triassic (230–208 ... ...traditionally distinguished based on the arch vertebrae in the former and the husk vertebrae in the latter. The Labyrinthodontia are fu... Found on http://www.britannica.com/eb/a-z/t/23