CRETACEOUS FISH JAW
This is the premaxilla (front of the upper jaw) of a Cretaceous fish, Pachyrhizodus, from the Niobrara Chalk of Western Kansas.
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© ©Harry Pristis 2007
By Harry Pristis
This is the premaxilla (front of the upper jaw) of a Cretaceous fish, Pachyrhizodus, from the Niobrara Chalk of Western Kansas.
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