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Infant stage Diplomystus Green River Fossil Fish Wyoming

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Infant stage Diplomystus Green River Fossil Fish Wyoming

Availability: In stock

Diplomystus dentatus (Cope, 1877)

Green River Formation - 50 Million years old
Kemmerer, Wyoming, USA

Diplomystus : 0.95 x 0.35 in.
(1 inch = 2.54 cm)

A large a well preserved Diplomystus with complete scales and a wonderfully rich deep color.

This specimen was collected by us in July 2015, and painstakingly prepared.

It is 100% as found and has no restoration, with our personal guarantee!



The Green River Formation in Wyoming is one of the most famous and important Eocene (50-45 million years old) sites in the world. It provides a glimpse of the daily life surrounding the great Fossil Lake. From the prolific fossil fish deposits, the Green River Formation is also famous for it's insect, mammal, and even plant fossils! The formation exposes itself from southern Wyoming and into Utah and Colorado and shows us how life was more temperate at that time, often 60-70 degrees Fahrenheit.