9.25" Diplomystus dentatus | Green River Formation | Wyoming fluorescent FeO/MnO = 62)

FeO/MnO = 62)

this prehistoric shark was at least one and one-half times as big as the biggest Great White Sharks alive today

Each fossil fish is unique

The Wyoming state fossil

5" to 1" in length

9.25" Diplomystus dentatus | Green River Formation | Wyoming fluorescent FeO/MnO = 62)Diplomystus dentatus Eocene (51. 98 Million Years Ago) Green River Formation, Wyoming, USA In Stone Fossils Private Quarry Plate approx. size: 12. 75" x 11. 5" Diplomystus approx. size: 9. 25" Diplomystus is an extinct genus of freshwater clupeomorph fish distantly related to modern day extant herrings, alewives, and sardines. The genus was first named and described by Edward Drinker Cope in 1877. Ray finned Fish Diplomystus dentatus Order