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USA Formation: Santana Age: Early Cretaceous
about twice as many as Tyrannosaurus
and would have functioned as molars
Ctenochasma is distinguished mainly by its numerous (over 400 in adults) long
up to approximately 12 meters (39 feet) in length
Eryops megacelphalus, amphibian Quetzalcoatlus USA Formation: Santana Age: EarlyEryops (pronounced EAR ee ops) (meaning "long eye" or "drawn out eye" in Greek) was a common, primitive labyrinthodontid amphibian that lived in Permian period swamps. This meat eater had a stout body with very wide ribs, a strong spine, four short, strong legs, a short tail, and a wide, elongated skull with many sharp teeth. Its teeth had enamel with a folded pattern. Eryops was about 5 feet long, one of the largest land animals of its time. Eryops
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