In Depth Macromerion is a genus of sphenacodont pelycosaur that lived in Europe during the Carboniferous. Further Reading - Lower Permian pelycosaurs from the English midlands. - Paleontology 17 (3): 541-552. - R. L. Paton - 1974.
In Depth Secodontosaurus is a fantastic genus of pelycosaur as not only do individuals have large sails on their backs, but they have skulls that are quite different to the other sphenacodontid pelycosaurs that they are related to. The naming of the Secodonotsaurus genus was actually a long time coming. The first Secodontosaurus fossils were … Read more