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Their heads were heavily armored with the rest of the body covered by small scales
Gars are members of Lepisosteiformes and are found from the Permian Period to the present day
features common to modern skulls are the high forehead
Zinjanthropus was an early hominin
Asaphiscus wheeleri, trilobite (Replica) Triceratops Their heads were heavily armoredFrom the Middle Cambrian of Utah. Trilobites are very well known, and possibly the second most famous fossil group after the dinosaurs with some 15,000 known species. Trilobites are extinct arthropods that form the class Trilobita. They appeared at the start of the Cambrian period and flourished throughout the lower Paleozoic era before beginning a drawn out decline to extinction when the last of the trilobites disappeared in the mass extinction at
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