Fossil Discovery Reveals Early Plant-Eating Land Vertebrate

Scientists have discovered a 307-million-year-old fossil skull in Nova Scotia, Canada, belonging to Tyrannoroter heberti, one of the earliest known land vertebrates to consume plants. The fossil, found within a fossilized tree stump on Cape Breton Island, was identified by Brian Hebert, an avocational paleontologist.

Tyrannoroter heberti, approximately the size and shape of an American football, possessed a robust skull with specialized teeth adapted for crushing and grinding vegetation. High-resolution micro-CT scans revealed additional teeth on the roof of its mouth, indicating adaptations for processing plant material.

The discovery suggests that experimentation with herbivory among terrestrial tetrapods occurred earlier than previously thought. Arjan Mann, assistant curator at the Field Museum and co-lead author of the study, stated,

"This is one of the oldest known four-legged animals to eat its veggies. It shows that experimentation with herbivory goes all the way back to the earliest terrestrial tetrapods—the ancient relatives of all land vertebrates, including us."

The findings provide new insights into the evolution of plant-eating behaviors in early land-dwelling vertebrates.