Dimetrodon SOLD 1.03" Neural Spine Fragment specimens we also have smaller fragments

we also have smaller fragments available

Bismuth is an element (Bi 83) best known for its unusual staircase shape

It measures 20

Please Note: SMALLER fragments of the Manhattan Project Shield Window are available

Turning to Earth

Dimetrodon SOLD 1.03" Neural Spine Fragment specimens we also have smaller fragmentsRare 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. 03" fossil fragment of the Dimetrodon's iconic spine. The purpose of the spine sail