Devonian through Triassic

• Extinct amphibians typically resembling heavy-bodied salamanders or crocodiles and having a solid flattened skull and conical teeth

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Labyrinthodonta \Lab`y*rin`tho*don"ta\, prop. n. pl. [NL. See Labyrinthodon .] (Paleon.) An extinct order of Amphibia, including the typical genus Labyrinthodon , and many other allied forms, from the Carboniferous, Permian, and Triassic formations. By ...