8.3" Exceptionally Rare Fossil Pond Turtle (Echmatemys) - Wyoming

This is an exceptionally rare, 8.3" long fossil pond turtle (Echmatemys) discovered during the summer of 2025 at our Fossil Lake Safari quarry near Kemmerer, Wyoming. Complete fossil turtles are among the rarest finds in the Green River Formation, and pond turtles of the family Emydidae are particularly rare. In fact, we estimate that only about half a dozen specimens of this genus have been recovered in more than a century of commercial fossil collecting in the formation.

The preservation of this specimen is outstanding, with excellent three-dimensional relief, articulated hind limbs, a complete skull, and a preserved tail. Most remarkably, the fossil turtle itself has no restoration whatsoever, an exceptional feature for a specimen of this rarity and completeness.

For display purposes, the turtle has been carefully inlaid into a larger limestone slab measuring 13 x 10", where it is attractively centered. The slab has been backed for additional stability, creating a spectacular display piece of exceptional rarity.

About Fossil Lake

50 million years ago, in the Eocene epoch, these fish thrived in Fossil Lake, which was fed by the Uinta and Rocky Mountain 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: 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.

Our Fossil Lake Safari Quarry just outside Kemmerer, Wyoming.
Our Fossil Lake Safari Quarry just outside Kemmerer, Wyoming.


FOR SALE
$29,500
DETAILS
SPECIES
Echmatemys sp.
LOCATION
Fossil Lake Safari Quarry, Kemmerer, Wyoming
FORMATION
Green River Formation
SIZE
8.3" long on 13 x 10" limestone
ITEM
#386812
GUARANTEE
We guarantee the authenticity of all of our specimens.