Eocene Green River Diplomystus VF-GR-17-046Diplomystus dentatus Green River Formation Middle Eocene Lincoln County, Wyoming This interesting specimen contains baby and juvenile examples of Diplomystus. This slab probably represents an example from a shallow, warm water facies of the Eocene lake that had good conditions for hatchlings. There are 5 Diplomystus fry skeletons and one fingerling skeleton. The slab is 27 cm by 17 cm. Diplomystus is an extinct genus of freshwater clupeomorph fish