l Tethys Fossils Home l Fossil Purchases l

Diplomystus dentatus Fossil Fish from Green River Formation


Description: These 50 million year old, Eocene-Era fossil fish come from one of the world's famous Laggerstatten, the Green River Formation in Wyoming. A small portion of the fish fossils from Green River exhibits such fine preservation. The significant extent of soft-tissue preservation that makes the site famous is evident in these specimens.

These fine fish are Diplomystus dentatus. Early workers proposed that this fish was closely related to Knightia, an incorrect assumption, as Diplomystus is not even placed within the same Order. Diplomystus has the body form and mouth placement of a surface feeder, and is thought to have been a predator of smaller surface-feeders such as Knightia. Indeed, specimens of Diplomystus have been found with Knightia lodged in their mouths, a classic demonstration of a predator caught by its prey!


Name: Order: Ellimmichyiformes: Family; Ellimmichthyidae; Diplomystus dentatus
Age: Eocene
Location: Green River Formation, Fossil Lake, Kemmerer, Wyoming

Click Fossil Pictures for Larger View
 Diplomystus dentatus
 Diplomystus dentatus
 
Size: 92 mm in length on a 120 mm by 77 mm matrix
Code GRF13 - Sold
Size: 95 mm in length on a 112 mm by 62 mm matrix
Code GRF17 - $60
Size: 102 mm in length on a 142 mm by 70 mm matrix
Code GRF18 - $70
Size: 82 mm in length on a 110 mm by 57 mm matrix
Code GRF12 - $50
 Diplomystus dentatus
 
Size: 95 mm in length on a 112 mm by 62 mm matrix
Code GRF212 - $45
Size: 102 mm in length on a 142 mm by 70 mm matrix
Code GRF213 - $45
Size: 82 mm in length on a 110 mm by 57 mm matrix
Code GRF214 - $50
Size: 73 mm in length on a 100 mm by 70 mm matrix
Code GRF215 - $45
   
Size: 78 mm in length on a 150 mm by 100 mm matrix
Code GRF216 - $50
Size: 110 mm in length on a 150 mm by 105 mm matrix
Code GRF218 - $65