Dimetrodon Spine Sail Fragments Size:Classic Riker Box Specimen it can oxidize during the

it can oxidize during the cooling process to form a thin layer of film

overcoming the Atlantic Ocean seemed an impossible task

as the cable failed within just a few weeks

Reapply polish as needed

Above: Copper Crystal specimens hanging out on a Permian sedimentary slab formed around the same time (geologically speaking)

Dimetrodon Spine Sail Fragments Size:Classic Riker Box Specimen it can oxidize during theWith 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.