Cotylorhynchus by Sergey Krasovskiy, atrox1 | The best known member of the synapsid clade Caseidae, the largest terrestrial vertebrates of the Early Permian
Before dinosaurs ruled the Earth, at the end of the Palaeozoic Era, the land was dominated by the synapsids. The synapsids (the amniote line that includes mammals) were a highly successful group wh…
acanthostega - Google-Suche
Erlikosaurus by atrox1
Centrosaurus, Pachyrhinosaurus, Anchiceratops, Chasmosaurus, Protoceratops skulls - Triceratops horridus "Raymond" skeleton, National Science Museum, Tokyo, Japan.