Dimetrodon Spine Sail Fragments protomammal and patterns vary widely

and patterns vary widely

The film was an instant success

this creature was a hornless member of the rhino family

and axes all fall under the designation of celt

" Stretching over 930 miles (1500 km)

Dimetrodon Spine Sail Fragments protomammal and patterns vary widelyWith a fearsome jaw and reptilian appearance, Dimetrodon is often mistaken for a dinosaur. However, this family of Early Permian Period species falls into a disparate taxonomic clade known as synapsids which includes mammals. This specimen is a fossil fragment of the Dimetrodon's iconic spine. The purpose of the spine sail is unknown, though speculation ranges from thermoregulation and locomotion.