Hyopsodus wortmani, fossil Green River mammal Argentinosaurus with a typical size range

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

a flying reptile

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

"Spinosaurus had short hind limbs (like early whales and other animals that spent more and more time in the water)

Hyopsodus wortmani, fossil Green River mammal Argentinosaurus with a typical size rangeThis 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