Dimetrodon Sail Spine | 280 Million Years | Texas

A nice section of Dimetrodon sail spine from Archer County, Texas. It features a clear groove running up the center which helped keep the long, thin sail spine bones strong without adding extra weight. They also created protective channels for blood vessels and tissue to nourish the skin of the sail and help Dimetrodon regulate its body temperature.

Dimetrodon was an apex predator that lived during the Early Permian period, approximately 295 to 272 million years ago. It is scientifically classified as a synapsid, a lineage of "mammal-like" creatures more closely related to modern humans and other mammals than to true reptiles. Its name means "two measures of teeth," referring to its unique dental structure: it possessed sharp, serrated canines for killing and smaller shearing teeth for tearing meat—a precursor to the diverse tooth types found in mammals today.

The sail spine comes stored in a display box featuring the specimen name, region it was found and age (fossil can be removed from box).

This is genuine fossil. All the specimens we offer come with a lifetime authenticity guarantee.

Condition: Good | Size: 0.94 inch | Age: 280 Million Years | Found: Archer County, Texas (Archer City Formation)