temnospondyli

from The Century Dictionary.

• A suborder of stegocephalian Amphibia in which the vertebræ are composed of several pieces, usually of the rachitomous type, some-times embolomerous: occurring in rocks from the Carboniferous and the Lower Trias. The basioccipital region is usually, and the carpus and tarsus are always, ossified. The teeth have radially infolded walls.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun formerly a suborder of Stegocephalia; large Carboniferous and Permian amphibians having vertebrae in which some elements remain separate