Diadectes

Diadectes (meaning crosswise-biter) is a genus of large, very reptile-like amphibians that lived during the early Permian period (Artinskian-Kungurian stages of the Cisuralian epoch, between 290 and 272 million years ago[1]). Diadecteswas one of the very first herbivorous tetrapods, and also one of the first fully terrestrial animals to attain large size.