Dimetrodon 0.97" Neural Spine Fragment giftsforher 60" Woolly Rhinoceros Tooth recovered

60" Woolly Rhinoceros Tooth recovered from Siberia

179" Dendraster gibbsii from the San Joaquin Valley deposit

81" slice of petrified wood from Arizona

" Science 208

Dimetrodon 0.97" Neural Spine Fragment giftsforher 60" Woolly Rhinoceros Tooth recoveredRare 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. 97" fossil fragment of the Dimetrodon's iconic spine. The purpose of the spine sail