Anthracosaurus

Anthracosaurus is an extinct genus of embolomere (which were reptile-like amphibians) that lived during the Late Carboniferous in what is now Scotland, England, and Ohio. Measuring around 10 ft long, it was a large, aquatic eel-like predator. It has a robust skull about 40 centimetres in length with large teeth in the jaws and on the roof of the mouth. They are not related to modern amphibians, which constitute a separate branch of amphibian order altogether. The last of Anthracosaurs died out approximately 248 MYA, during the Permian.