DIPLOMYSTUS
Another common and widespread genus found in the Green River formation. Size ranges from 5" to more than 10" with the average being 5" - 8". Call or write the Fossil Gallery for more infomation on a specimen shown, framing options, or other specimens and sizes available.

APPROXIMATE SPECIMEN SIZE: 5" to 8"

PRICE (UNFRAMED): $60 – $255 (US)

The largest herring genus in the ancient lake deposits is the Diplomystus. It can be distinguished from the Knightia by the presence and pattern of scale rows or scutes that lie along the midline of the back from the skull to the dorsal fin. The deep bodied form and elongnate anal fin are easily recognizable traits of this fish. In the late 1800’s, Professor E.D. Cope described three species of Diplomystus. The largest and most widely known is the Diplomystus dentatus. It was this species of fish from Fossil Syncline Lake, prepared by Carl Ulrich, that was chosen by the late President Eisenhower as a gift to the Emperor of Japan from the American people. The body form and upturned mouth indicate that the fish probably fed on smaller surface dwelling species such as Knightia and Priscacara. Several prime examples of Diplomystus’ diet have turned up in the stomachs of a few specimens.
Ulrich's Fossil Gallery
307-877-6466 • 307-877-3289 (fax)
csulrich@onewest.net