images

Dimetrodons

by

Walter B. Myers/Novapix

Reference

t-din00-20001

Date

2009-03-27

Dimetrodon fight over territory in a scene that must have been repeated many times 280 million years ago. Their spectacular sails are backlit revealing the translucent skin supported by long neural spines, each one sprouting from an individual vertebra. These dimetrodons are each about 11 feet long.