0.8" Captorhinus Aguti Fossil Femur Bone Permian Age Reptile 299 Mil Yrs Old Display COA

Location: Admiral Formation, Lawton, Oklahoma

Weight: 0.5 Ounces

Dimensions: 0.8 Inches Long, 0.2 Inches Wide, 0.2 Inches Thick

Comes with a free Gem Jar display. 

Comes with a Certificate of Authenticity.

The item pictured is the one you will receive. 

Captorhinus aguti is one of the earliest known reptiles from the Permian Period and offers crucial evidence for understanding reptile origins. This small animal, measuring about 30 centimeters in total length, had a lightweight build with slender limbs and a short skull, giving it a lizard-like appearance. Fossils discovered in North America show that Captorhinus lived long before the rise of dinosaurs and represents a foundational stage in reptilian evolution.

As a member of the captorhinomorphs, Captorhinus possessed a nearly solid skull without openings for large jaw muscles. While this limited its biting power, it reflects an early evolutionary design before more advanced skull structures emerged. Over time, reptiles with stronger jaws and more efficient chewing adaptations replaced these primitive forms.

Only a few captorhinomorph descendants survived into the Triassic before eventually disappearing. The study of Captorhinus helps paleontologists trace the gradual evolution of reptile anatomy and the early diversification of life on land.