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Rare Adult Axestemys byssinus Turtle | Green River Formation

Original price $195,000.00 - Original price $195,000.00
Original price
$195,000.00 - $195,000.00
Current price $195,000.00
Adult Axestemys byssinus, Trionyx Soft Shelled Turtle
Eocene (52 Million Years Ago) 
Green River Formation
Wyoming, USA

Turtle is approx. 46" long

Matrix is approx. 49" x 42" x 2.5"

This specimen is an exceptionally rare and well preserved freshwater Turtle from the Green River Formation.

Although this beautiful specimen is in its natural matrix, some minor restoration has been done to preserve the integrity of the specimen. We have used the latest and newest restoration practices to bring this Axestemys byssinus Turtle fossil to life.


**Due to the size of this specimen, it will be shipped in an internationally compliant wooden crate. The plate itself is backed with 3/4" plywood for durability and easy wall hanging, a french cleat hanging system is included as well.
Please contact us for a specific shipping rate. You may opt in for in-store pickup to cut your shipping costs all together and pick up your specimen in person. You can pick up from our store location in Kemmerer, Wyoming, or we deliver to both the Denver Gem & Mineral show in the Fall and the Tucson Gem & Mineral show in the winter. For any questions, please don't hesitate to contact us directly.

Order Testudines, Family Trionychidae
Members of the Trionychidae family:

  • have webbed claws and feet
  • only 3 claws on each hand
  • have solid bone on the central part of their body, covered by thick skin
  • lack hard bone on the outer edges of their shells
  • can move quickly in open water and through muddy lake bottoms due to their light, flexible shells

Living members of the Trionychidae family:

  • are strict carnivores
  • known to feed on: fish, amphibians, invertebrates, birds, and mammals
  • found in North America, Africa, and Asia

The 25 living species of the Trionychidae family are found exclusively in freshwater systems, suggesting that the upper portion of Fossil Lake was not salty.
Both A. heteroglypta and A. byssinus would have been apex (top of the food chain) or near-apex predators of Fossil Lake.