13084 - Finest Grade Diplomystus dentatus Fossil Fish Green River Fm WY Eocene Age
13084 - Finest Grade Diplomystus dentatus Fossil Fish Green River Fm WY Eocene Age 13084 - Finest Grade Diplomystus dentatus Fossil Fish Green River Fm WY Eocene Age 13084 - Finest Grade Diplomystus dentatus Fossil Fish Green River Fm WY Eocene Age 13084 - Finest Grade Diplomystus dentatus Fossil Fish Green River Fm WY Eocene Age

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13084 - Finest Grade Diplomystus dentatus Fossil Fish Green River Fm WY Eocene Age

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Species
Diplomystus dentatus, Cope 1877
Age
Eocene (~48 million years)
Location
Kemmerer, Wyoming, USA
Formation
Green River Formation
Size
125 mm   •    in
Weight
840 g   •    oz
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Description
Scientific name: Diplomystus dentatus

Location: Kemmerer, Wyoming

Geological Formation: Green River Fm

Age: Eocene ( 56 million years)

Size: 12.5cm long - Plate: 18 x 12.8 x 3.8cm

Ref: K5

Diplomystus dentatus morphology, including its upturned mouth, is prototypic of a surface-feeding fish. The genus is herrings that likely fed on small surface-dwelling fish as Knightia is evidenced by numerous fossils found with Knightia in the stomach or mouth.

Fifty million years ago ancient Fossil Lake existed in what is now southwest Wyoming.

The unusual chemistry of fossil lake prevented decay and scavenging of dead organisms while millimeter-thick layers of alternating limestone matter slowly accumulated. The result is laminated limestones that contained the highest concentration of fossil fish in the world.

Since the discovery in the 1870's, many perfectly preserved fossil fish have been recovered. Preserved with the fish in the laminated limestone is a complete aquatic ecosystem: plants, insects, crustaceans, amphibians (frog and primitive salamander), alligators, turtles, birds, mammals, etc
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