Permian synapsids included some large members such as "Dimetrodon". He transforms into a "Dimetrodon". Well-known pelycosaurs include the genera "Dimetrodon", "Sphenacodon", "Edaphosaurus", and "Ophiacodon". Texas was also home to the pelycosaurs "Dimetrodon" and "Edaphosaurus". No fossil evidence of "Dimetrodon"'s skin has yet been found. Creatures such as Dimetrodon and Edaphosaurus ruled the new continent. No known varanopids developed a sail like "Dimetrodon". Creatures such as "Dimetrodon" and "Edaphosaurus" ruled the new continent. It is also the smallest species of "Dimetrodon". It was very similar to the "Dimetrodon" in its appearance, except there were generally smaller. "Secodontosaurus longiramus", that was closely related to "Dimetrodon". They were about a foot shorter than their cousin the "Dimetrodon"; about 8 feet long. Case reclassified "C. gigas" as a new species of "Dimetrodon" in 1907. It is also the largest species of Dimetrodon. It is now considered a synonym of "Dimetrodon macrospondylus".