Pterichthyodes milleri, Placoderm Pachycephalosaurus The curve of the shell

The curve of the shell is easy to see

and subsequently covered it up

But if you would rather forget we said that and instead reminisce on the more romantic "T

4 inches high

Pterichthyodes milleri, Placoderm Pachycephalosaurus The curve of the shellPterichthyodes is a genus of antiarch placoderm fishes from the Devonian period. Its fossils have been discovered in Sandwich Fish Beds of Ouoyloo, Orkney Islands, Scotland. They were one of the first species recognized for what they were, as their fossils are common in the Old Red Sandstone formation studied by geologists in the early 19th century. Due to their extreme divergence from modern day fish, they were a puzzle unsolved until Charles Darwin