New species of ancient cynodont, 220 million years old, discovered - Phys.org

Fossilized jaw bone fragments of a rat-like creature found at the Petrified Forest National Park in Arizona last year by a Virginia Tech College of Science Ph.D. candidate are in fact a newly discovered 220-million-year-old species of cynodont or stem-mammal,… https://phys.org/news/2020-11-species-ancient-cynodont-million-years.html