Dimetrodon SOLD 1.12" Neural Spine Fragment rockinaboxacrylic the Empire State Building was

the Empire State Building was the tallest building on the planet

plus a spiked tail for use in combat

This specimen is a fragment of Tyrannosaurus rex bone

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

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 the Empire State Building wasRare 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