Eocene Period- C. 50 Million Years Ago

Order to which the fossil belongs: Perciformes
Name of which the family belongs: Percidae

The Mioplosus labracoides comes from one of the world’s famous Laggerstatten, the Green River Formation in Wyoming.  Its distinguishing features include a long body, many pointed teeth, a fan-shaped tail and double dorsal fins, of which the second dorsal fin and anal fin are sub-equal in size and positioned opposite each other. Mioplosus labracoides is a voracious and solitary predator and several have been found with fish lodged in their throat.
Good definition of the Mioplosus on a matrix of sub-oolitic limestone.
Matrix: 157mm x 220mm length
Diplomystus: 147mm length