Rare, 13.3" Notogoneus Fish Fossil - Wyoming

This is an exceptionally nice, 13.3" specimen of Notogoneus osculus one of the rare species of fish from the Green River Formation of Wyoming. This specimen is 18" in length and located on a thick 23.7x17.7 slab of shale. We can back the piece and install a french cleat hanging system to allow it to be easily hung on a wall at no charge. The slab of rock is pretty large, so we can also trim it down upon request.

Notogoneus was a predator and the down-turned mouth is probably an indicator that it fed on prey at the lakes bottom. It is thought that it's scarcity results from the fact that it is felt it migrated between the lake and the rivers that fed it throughout the year to feed.

It comes from the coveted 18 inch layer of the Green River Formation which produces darker and more detailed fish than the majority on the market. The rock from this layer is much harder and more durable. This layer is typically collected at night using low angle light to see the bump in the rock that the back bone create. They then cut these fish out and take them to a lab where the fish which maybe up to an inch under the surface of the rock are meticulously extracted under microscope with hand tools.

50 million years ago, in the Eocene these fish thrived in Fossil Lake fed by Uinta and Rocky Mtn. highlands. The anoxic conditions at the bottom of Fossil Lake slowed bacterial decomposition, prevented scavengers from disturbing corpses, and most interestingly, suffocated creatures that ventured into the oxygen-starved aquatic layer. The result is a miraculous exhibition of Eocene biota in a subtropical, aquatic community within sycamore forests teeming with creatures such as freshwater stingrays, dog-sized horses, menacing alligators, early flying bats, and one of the first primates.
Notogoneus osculus
Warfield's Quarry, Kemmerer, Wyoming
Green River Formation, 18 Inch Layer
13.3" long, 23.7x17.7" rock
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