KNIGHTIA alta from the famous Kemmerer Fossil Beds
Green River Formation
These fish are 3 1/2 inch long KNIGHTIA alta, and the negative of a 4 1/2 inch DIPLOMYSTUS dentatus and is on cream colored matrix measuring 5 inches x 7 inches. Your fish will come with the fossil fish story card that describes how the fish was fossilized.
Specimen in the picture is the specimen you will receive. Nice double block.