قراءة لمدة 1 دقيقة Cisuralian

The Cisuralian is the first series/epoch of the Permian.
Biodiversity.
The Cisuralian was full of many animals such as actinopterygian "Amblypterus" and prototherapsid "Tetraceratops".
The swampy fringes were mostly ferns, seed ferns, and lycophytes.
An unusual shark called "Helicoprion" also made its appearance.
This strange fish had a tooth whorl.