Ammonite From The Upper Triassic Luning Formation, Nevada

I imaged this ammonite (such a Triassic form is also called an ammonoid) from a public domain document; photographs from such a public domain source can be used without prior approval.

Scientifically, the ammonite is called Tropites nevadensus, from the Upper Triassic Luning Formation, Union Canyon, Nevada.

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