Green River 18" Layer Mioplosus labracoides Fish Fossil

Mioplosus labracoides

Order Perciformes, Family Percidae

Geological Time: Eocene

Size: Fish Fossil is 5 1/2” on a 10 1/2 x 8 ¾” plate

Fossil Site: Green River Formation, 18 Inch Layer, Kemmerer, Wyoming

Fossil Code: PFF406

Price: $145.00


Mioplosus labracoidesDescription: Mioplosus labracoides is believed to have been a voracious predator among the Green River fish fossils. Failure to find its numbers in mass mortality leads to further conjecture that it was a solitary hunter. A member of the Family Percidae, it has numerous relatives in Northern Hemisphere fresh water as well as fossil relatives in Asia, Europe and New Zealand. It is known as a predatory species as determined from its many pointed teeth, and the fact that several have been found with fish lodged in its throat. It may be related to the modern-day pike of the genus Stezostedion.

Distinguishing features include double dorsal fins and a fan-like tail. Mioplosus is uncommon in the Green River formation.

This is a large adult size specimen with excellent preservation of the backbone, head and adjoining fins, and many sharp teeth. It would make an excellent centerpiece or decorative addition to your collection, office or home. It comes from the world famous 18” layer. The best-preserved fish come from the 18-inch layer. Because the sediment is highly laminated, the fish can often be removed nearly whole. This layer, in the area near Fossil Butte, does indeed average about 18 inches in thickness. These fish exhibit a dark chocolate color and must be meticulously prepared for presentation.

Fish Fossil Sales


Fossil Mall Navigation:
l Home l Fossils for Sale Map l Museum and Rare Fossils l Fossil Sales l

Navigate by Fossil Category:
l Trilobite Fossils l Ammonite Fossils l Dinosaur and Reptile Fossils l
l Crinoids and Echinoderms l Fossil Fish l Insect Fossils l Invertebrate Fossils l
l Plant Fossils l Stromatolites l Trace & Ichnofossils l
l Moroccan Trilobites l Russian Trilobites l Vertebrate Fossils l Fossil Amber l

Fossils & Science:
l Science Section l Paleobiology and Geological Timeline l