Hyopsodus wortmani, fossil Green River mammal Argentinosaurus The Messel Pit was closed

The Messel Pit was closed to collecting in 1974

Few collectors can afford a real specimens like this because they sell for hundreds of dollars

with a typical size range of two to seven centimeters (1 to 3 inches)

a flying reptile

Aspidella is confirmed as a body fossil from observations of complex radial and concentric ornamentation

Hyopsodus wortmani, fossil Green River mammal Argentinosaurus The Messel Pit was closedThis is an undescribed species of Hyopsodus a genus of extinct condylarth mammal of the hyopsodontid family. Fossils of this genus have been found in North America, especially the bighorn basin region of the United States. They are oftentimes nicknamed "tube sheep", due to their strange, weasel like body. This specimen was found in the Green River Formation of Wyoming. Shipping Included