Dimetrodon 0.81" Neural Spine Fragment rockinaboxgembonependant cephalopods like ammonites

cephalopods like ammonites

Copper Crystals first appeared in the Fourth Edition of the Mini Museum

During the Ordovician

Above: A fossilized Hyracodon skeleton in the Los Angeles Natural History Museum (Source: Dawn Pedersen/Flickr)

Dimetrodon 0.81" Neural Spine Fragment rockinaboxgembonependant cephalopods like ammonitesRare Permian Material! If all fossils are out of stock, sign up for email notifications as we do expect to get more over time. With a fearsome jaw and reptilian appearance, Dimetrodon is often mistaken for a dinosaur. However, this family of Early Permian Age species falls into a disparate taxonomic clade known as Synapsids which includes Mammals. This specimen is a 0. 81" fossil fragment of the Dimetrodon's iconic spine. The purpose of the spine sail