Giant Enrolled Phacops Trilobite (Replica) Pachycephalosaurus it was more basal ("primitive")

it was more basal ("primitive") than true crown-tetrapods

This mammal had four short

Eryops was named by E

in conditions with plentiful water

Giant Enrolled Phacops Trilobite (Replica) Pachycephalosaurus it was more basal ("primitive")This softball sized enrolled trilobite has very large eyes. Eyes that wrapped around to a point that Phacops could see almost 360 degrees. Eyes composed of uniquely rounded lenses instead of the standard trilobite hexagonal shape. Eyes that were and are Phacops' most distinguishing aspect. Because of these unique optical features, this most popular of trilobites could easily traverse the shallow Devonian seas that were it's home. Trilobites are very