Dimetrodon Spine Sail Fragments Size:Classic Riker Box Specimen The yellow color of the

The yellow color of the glass is due to a high concentration of lead-oxide (up to 30% in this case)

000 km beginning in Olympia

also known as osteoderms

The specimen is housed in an acrylic jar that is encased within a glass-topped riker display box

Dimetrodon Spine Sail Fragments Size:Classic Riker Box Specimen The yellow color of 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.