Overview
- The peer-reviewed study in Nature Ecology & Evolution names the species Tyrannoroter heberti and places it among pantylid microsaurs, a stem-amniote lineage.
- The only known fossil is a skull discovered by Brian Hebert in a fossilized tree stump on Cape Breton Island, with the animal estimated at roughly 25–30 centimeters long and stocky.
- High-resolution 3D reconstruction reveals opposing dental fields, including palatal teeth and enlarged jaw-muscle chambers, consistent with processing tough plant material.
- Researchers note the animal likely was not strictly vegetarian and may have eaten insects, supporting a proposed pathway from insectivory to herbivory via crushing dentition and gut microbes.
- Re-examination of related pantylid specimens uncovered similar herbivorous features, some as old as about 318 million years, and the team links the lineage’s later decline to the Carboniferous rainforest collapse.