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5 million years ago having existed for approximately 11
The curve of the shell is easy to see
human hunting was likely a strong contributing factor
Their vertebral columns consisted of ten neck vertebrae
Pterichthyodes milleri, Placoderm Pachycephalosaurus 5 million years ago havingPterichthyodes 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
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