This listing features a naturally untreated Knightia alta fossil from the world-famous Green River Formation in Wyoming, USA. This exquisite specimen is an authentic piece of prehistoric history from the Eocene Period, approximately 50 million years old. Unlike many fossils that have been artificially enhanced, this specimen has been left in its natural state, preserving its genuine fossilized detail.
Knightia alta is an extinct genus of schooling fish that thrived in freshwater lakes during the Eocene. It is closely related to Knightia eocaena, a more common species, but distinguished by its more elongated body shape and robust fin structure. These fish were an important part of the ancient lake ecosystem, serving as a primary food source for larger predators such as turtles and primitive crocodilians. Fossils from the Green River Formation are renowned for their exceptional preservation, allowing for detailed examination of scales, fin rays, and even stomach contents in some cases.
The fish fossil shown in the images is the exact specimen you will receive—no stock images used.
This Knightia alta fish fossil is a remarkable piece of natural history, offering a glimpse into an ancient freshwater ecosystem from over 50 million years ago. A must-have for any serious fossil collector!