Skip to main content
Go to accessibility notice


    Edmontosaurus annectens
    Cretaceous, Maastrichtian stage
    Agee Ranch (Private lease 9/89 thru 9/99),Two Medicine Formation, Browning, Montana

    This virtually complete skeleton was discovered in the spring of 1990 at the site of what was, during the late Cretaceous period of North America, an ancient riverbed. This highly articulated and extraordinary complete (approximately 90%) young dinosaur was found lying on its side in relatively close proximity to another juvenile Edmontosaurus (apparently a sibling) and a partially complete adult (apparently a parent). The bones that comprise this skeleton were found in an articulated state all within a fifteen square foot area. From their positioning at the excavation site, it is theorized that this small family was attempting to ford a river when some unknown cataclysmic event caused the waters to swell rapidly, overwhelming the trio. The extraordinary state of this dinosaur's preservation is likely the result of the large amount of sediment and silt that would have accompanied the floodwaters and covered it quickly and completely. In this scenario the fossilization process is expedited which would account for the richness of color and exquisite detail.

    In the world of paleontology, juvenile dinosaur skeletons of any species are exceedingly rare and individuals that are beyond 90% complete, such as the present specimen, are almost unheard of, making this superb little Edmontosaurus an important paleontological treasure.

    Edmontosaurus, a member of the Hadrosauridae family, were part of a well-known group of "duck" lizards easily recognizable by their distinctively flattened duck-like beaks. They were so numerous and traveled in such large herds, that they have been referred to as the "Cattle of the Cretaceous" and were most likely the favorite prey of Tyrannosaurus rex as evidenced by the numerous Hadrosaurus bones that have been discovered with T-rex teeth marks.

    This extraordinary dinosaur is mounted on a beautifully designed minimalist base custom fitted with high quality castors for ease of mobility on any flat surface. It has been intelligently designed for easy assembly fitting together only 8 pre-mounted sections on their structural supports.

    The skeleton measures 10 feet in length along the curves but occupies a space of only 8 feet in length, 5 feet 6 inches high, and 2 feet 8 inches wide...
    perfectly suited for domestic and/or corporate life.

    Details of restoration available upon request.

    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. Some condition issues may not be noted in the condition report but are apparent in the provided photos which are considered part of the condition report. 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. Heritage does not guarantee the condition of frames and shall not be liable for any damage/scratches to frames, glass/acrylic coverings, original boxes, display accessories, or art that has slipped in frames. All lots are sold "AS IS" under the Terms & Conditions of Auction.

    Auction Info

    Auction Dates
    June, 2008
    8th Sunday
    Bids + Registered Phone Bidders: 2
    Lot Tracking Activity: N/A
    Page Views: 4,825

    Buyer's Premium per Lot:
    19.5% of the successful bid (minimum $9) per lot.

    Shipping, Taxes, Terms and Bidding
    This item cannot be shipped using standard methods. Please contact us for more information. Sales Tax information

    Important information concerning Sales Tax and Resale Certificates. Learn More

    Terms and Conditions  |  Bidding Guidelines and Bid Increments |  Glossary of Terms

    Sold on Jun 8, 2008 for: Sign-in or Join (free & quick)
    Track Item

    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
    Consign to the 2022 May 21 Texas Art Signature® Auction .

    Learn about consigning with us

    Wow; aren’t we lucky to meet you. Thanks for the great info and superior client service.
    Paul & Gerri M.,
    New York, NY
    View More Testimonials receives more traffic than any other auction house website. (Source:

    Video tutorial

    Getting the most out of search