A large Diplomystus dentatus fish, Green River Formation, Wyoming, USA.
The fossil is 50 million years old, from the Eocene Period.
It was a surface feeder as can be seen from the upturned mouth, and they preyed on smaller fish such as Knightia.
50 million years ago a lake existed in what is now Wyoming, with a size of around 930 square miles. The unusual chemistry of the lake prevented decay and the scavenging of the dead organisms, while thin layers of alternating limestone and organic matter slowly accumulated.
This superb specimen is from the 18" layer (or "Dark Fish Layer) of Fossil Butte.
From here come fish with black bones and dark brown scales.
The coloration is produced by the presence of Kerogen, an organic rich material formed from decomposed micro-organisms.
Very collectible, or can be used as interior design.
Plate Size: 48 cm x 37 cm & Fish 36 cm long
Weight: 6 kg
- Large Fossil Bony Fish
- on original matrix - Green River, Wyoming
- Scientific name
- Diplomystus dentatus
- Geological Period
- Good condition