1) Pelycosauria 1) Synapsid 2) Synapsid reptile 
Edaphosaurus is important as one of the earliest known large plant-eating (herbivorous) amniote tetrapods (four-legged land-living vertebrates). In addition to the large tooth plates in its jaws, the most characteristic feature of Edaphosaurus is a sail on its back. A number of other synapsids from the same time period also have tall dorsal sails,...
primitive herbivorous relative of mammals that is found in fossil deposits dating from Late Carboniferous to the Early Permian periods (323 to 256 ... [1 related articles]
(pronounced ah-DAFF-oh-SAWR-us) Edaphosaurus meaning pavement lizard - Cope's term for its tooth plates) was an herbivorous early synapsid that lived during the late Carboniferous and early Permian period , about 320 to 258 million years ago, long before the dinosaurs existed. This pelycosaur (early synapsids ) was related to Dimetrodon and had lon...
[n] - heavy-bodied reptile with a dorsal sail or crest
Edaphosaurus A “ground-earth lizard” that lived during the Late Carboniferous and Early Permian periods. Its fossils have been found in Europe and North America.
noun heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic