River Diplomystus Fossil Fish
Order Ellimmichyiformes, Family Ellimmichthyidae
fossil is 6 1/2” in length on a 10 x 8” plate
Green River Formation, 18" Layer, Kemmerer, Wyoming
Diplomystus' morphology, including its upturned mouth is prototypic
of a surface feeding fish. The genus are herrings that likely fed
on small surface dwelling fish as Knightia, is evidenced by numerous
fossils found with Knightia in the stomach or mouth.
is a medium sized adult size specimen with remarkable preservation
of the backbone, head and adjoining fins.
Of special note are the
thick well-defined spines and skin. It is a deep chocolate color,
indicative of the 18” layer. This is the horizon from which
the best -preserved fish are found. This fossil would make an excellent
centerpiece or decorative addition to your collection, office or
of the best-preserved fish come from the 18-inch layer. Because
the sediment is highly laminated, the fish can often be removed
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.
to Buy Fossils
fossil pictures to enlarge