Description

Early Permian

Arroyo Formation

Haskell county, TX, USA

Excellent 0.3 inch tooth.

Amphibian.

Seymouria is a genus of a very reptile-like amphibian of the Early Permian.  It was so reptile-like that paleontologists considered it an early reptile when it was first studied.  It was around that time that it was even considered a transitional form between the two groups.   However, it lived at a time after reptiles had already appeared.