The first bones discovered at the lower level of the K2 site yesterday; the large bone on the right is one of the two we believed to be Edaphosaurus - until today.
At the K2 site yesterday, Dr. Bakker holds what was believed to be an Edaphosaurus vertebra.
Here's how we know:
A tiny Xenacanthus tooth. In the background, a team member excavates a site yielding fossilized cartilage from this species.
The jawbone of a Permian amphibian, found by Kathleen Zoehfeld this morning.
An unidentified (so far) vertebra found at the Amy site this morning.