Priscacara liops, Priscacara serrata, Knightia eocaena, Knightia alta, Diplomystus dentata
    Green River Formation, Wyoming

    Known now as the "Fossil Lake", 50 million years ago the 25,000 square mile Green River Formation in Wyoming was an interconnected system of subtropical inland freshwater lakes. Today it is one of the most abundant and well-preserved sources of freshwater fossils in the world, producing some 19 genera of fish from the Eocene epoch. This superb plaque displays something of that abundance and variety, with multiple examples of separate species, from the larval Diplomystus (2 7/8 inches long) to the fearsome looking full-grown version (18½ inches long). The predaceous Diplomystus is a relative of today's herring, with a distinctive upturned mouth bristling with teeth, ideally suited to surface-feeding. One of its most common prey was the smaller Knightia, also a relative of the herring and an abundant denizen of the Fossil Lake as well as Wyoming's official State Fossil. It is represented here by four K. eocaena and three of the smaller, fatter K. alta. Two species of Priscacara also roamed these waters, the P. liops which rarely exceeded 6 inches in length, and the P. serrata which is represented here by an 11¼-inch example. The notable aspect of all fossils from this locality is the superb state of preservation they display, and the incredible skill of the local preparators, perfectly exhibited by the present example. The fish all boast the superb detail of bone structure and texture familiar in these specimens, and their dark brown coloring stands out in striking contrast from the pale cream matrix; an outstanding display piece, it measures 39½ x 51¼ inches.

    Estimate: $16,000 - $20,000.

    Condition Report*:

    Condition report available upon request.

    *Heritage Auctions strives to provide as much information as possible but encourages in-person inspection by bidders. Statements regarding the condition of objects are only for general guidance and should not be relied upon as complete statements of fact, and do not constitute a representation, warranty or assumption of liability by Heritage. Please note that we do not de-frame lots estimated at $1,000 or less and may not be able to provide additional details for lots valued under $500. All lots are sold "AS IS" under the Terms & Conditions of Auction.

    Fees, Shipping, and Handling Description: Requires 3rd Party Shipping (view shipping information)

    Sales Tax information  |  Terms and Conditions

    Bidding Guidelines and Bid Increments

    Glossary of Terms

    Auction Info

    Auction Dates
    January, 2010
    17th Sunday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 969

    Buyer's Premium per Lot:
    19.5% of the successful bid (minimum $14) per lot.

    Sold for: Sign-in or Join (free & quick)

    Heritage membership

    Join Now - It's Free

    1. Past Auction Values (prices, photos, full descriptions, etc.)
    2. Bid online
    3. Free Collector newsletter
    4. Want List with instant e-mail notifications
    5. Reduced auction commissions when you resell your
    Consign now
    • Cash Advances
    • More Bidders
    • Trusted Experts
    • Over 200,000 Satisfied Consignors Since 1976
    Only 45 days left to consign to the 2018 March 10 - 11 Estates - Dallas!

    Learn about consigning with us

    I look forward to several future consignments with Heritage and with your continued guidance and expertise.
    William Levin, M.D.,
    Beverly Hills, CA
    View More Testimonials receives more traffic than any other auction house website. (Source:

    Video tutorial

    Getting the most out of search

    Recent auctions

    2017 October 13 Illustration Art Signature Auction - Dallas
    2017 October 13 Illustration Art Signature Auction - Dallas
    REALIZED $1,098,328