Dimetrodon SOLD 1.12" Neural Spine Fragment rockinaboxacrylic Above: Luis (left) and Walter

Above: Luis (left) and Walter Alvarez at the K-Pg Boundary in Gubbio

plus a spiked tail for use in combat

" International Journal of Astrobiology

Glass like this is formed from the intense heat melting sediments and is scientifically known as a tektite

Dimetrodon SOLD 1.12" Neural Spine Fragment rockinaboxacrylic Above: Luis (left) and WalterRare 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 1. 12" fossil fragment of the Dimetrodon's iconic spine. The purpose of the spine sail