Knightia eocaena, restored specimen
Eocene (52.3 Million Years Ago)
Green River Formation, Wyoming, USA
In Stone Fossils Private Quarry
Plate size: Approx. 7.5" x 7.5"
Fish size: 5"
Herrings - 2 Species Identified: Knightia eocaena & Knightia altaOrder Clupeiformes, Family Clupeidae
The Clupeidae family has an estimated 50 modern freshwater species. Clupeidae species can lay as many as 200,000 eggs at once, allowing species to multiply quickly. Modern species are also prone to mass die offs.
K. eocaena is:
- The most common fish found from Fossil Lake.
- The most commonly found articulated vertebrate fossil in the world.
- The Wyoming state fossil.
K. eocaena specimens of all sizes are found in mass mortality plates, indicating this species schooled as both a juvenile and adult. The average adult size of K. eocaena specimens is about 6 inches, though specimens as large as 10 inches have been found.