Skip to main content
Go to accessibility notice

    Description

    FINE AMERICAN MOSASAUR SKULL
    Tylosaurus kansasensis
    Late Cretaceous
    Smoky Hill Chalk, Niobrara Formation, Logan
    Co., Western Kansas, USA
    Undisputed Emperors of the high Cretaceous seas, the Mosasauridae were a family of serpentine marine reptiles, apex predators, and scourge of the many and varied ocean-dwelling creatures with which they shared the ancient waters. With a heavy, barrel-shaped body and long propulsive tail, it outlasted all rivals. The family was named for the river Meuse, near Maastricht in the Netherlands, where remains of this astonishing creature were first discovered in the late eighteenth century. Over seventy different species have been discovered around the world, however, in Antarctica, Australasia, Europe, Africa, and the Americas from north to south, ranging from 7 feet in length, to the monstrous 55-foot long Mosasaurus hoffmanni of the late Cretaceous Niobrara chalk in Kansas. This is an outstanding example of a Tylosaurus skull, perfectly preserved with superlative, fine-grained bone texture and a wonderful woody patination. It boasts a near-complete set of the robust and extremely effective-looking, recurvate teeth, with a lovely dark brown enamel. These are backed up by the curious secondary array of pterygoid (flanged) teeth on the palate. The Mosasaur had a soft skull and a jaw that could unhinge, and probably swallowed its prey whole. The still-living food would have been greatly hindered from escaping from the deadly creature's mouth by this nasty surprise waiting inside. Such jaws and dentition are a distinctive feature of Snakes, suggesting to Edward Drinker Cope that Snakes and Mosasaurs may have shared a common ancestor (in fact, they are most similar to the modern Monitor lizards). A museum-standard and highly evocative specimen, the skull measures 47 inches long, presented on an ebonized metal display stand, 23½ inches high.


    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. All lots are sold "AS IS" under the Terms & Conditions of Auction.

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

    Sales Tax information  |  Terms and Conditions

    Bidding Guidelines and Bid Increments

    Glossary of Terms

    Auction Info

    Auction Dates
    May, 2012
    20th Sunday
    Bids + Registered Phone Bidders: 2
    Lot Tracking Activity: N/A
    Page Views: 4,037

    Buyer's Premium per Lot:
    25% on the first $50,000 (minimum $14), plus 20% of any amount between $50,000 and $1,000,000, plus 12% of any amount over $1,000,000 per lot.

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

    Heritage membership

    Join Now - It's Free

    VIEW BENEFITS
    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
      winnings 
    Consign now
    • Cash Advances
    • More Bidders
    • Trusted Experts
    • Over 200,000 Satisfied Consignors Since 1976
    Only 30 days left to consign to the 2018 August 18 Nature & Science Signature Auction - Dallas!

    Learn about consigning with us

    I sent out several inquiries, but Moyun is the primary reason I went with Heritage. She is extremely knowledgeable.
    Linda H.,
    Washington, D.C.
    View More Testimonials

    HA.com receives more traffic than any other auction house website. (Source: Similarweb.com)

    Video tutorial

    Getting the most out of search

    Recent auctions

    2014 November 21 Tiffany, Lalique & Art Glass Signature Auction
    2014 November 21 Tiffany, Lalique & Art Glass Signature Auction
    REALIZED $1,441,296
    2014 November 17 American Art Signature Auction
    2014 November 17 American Art Signature Auction
    REALIZED $6,712,638
    2014 November 14 American Indian Art , Pre-Columbian, & Tribal Art Signature Auction
    2014 Nov 14 American Indian Art, Pre-Columbian & Tribal Art Auction
    REALIZED $441,524
    2014 November 8 Modern & Contemporary Art Signature Auction
    2014 November 8 Modern & Contemporary Art Signature Auction
    REALIZED $5,683,719
    2014 November 6 Silver & Vertu Signature Auction
    2014 November 6 Silver & Vertu Signature Auction
    REALIZED $439,980
    2014 October 18 The Belo Collection of Texas Art Signature Auction
    2014 October 18 The Belo Collection of Texas Art Signature Auction
    REALIZED $624,835
    2014 October 16 Photographs Signature Auction
    2014 October 16 Photographs Signature Auction
    REALIZED $824,108
    2014 September 28 Nature & Science Signature Auction
    2014 September 28 Nature & Science Signature Auction
    REALIZED $1,089,341
    2014 Sept 13-14 Gentleman Collector Signature Estate Auction
    2014 Sept 13-14 Gentleman Collector Signature Estate Auction
    REALIZED $1,725,292
    2018 April 24 Illustration Art Signature Auction - Dallas
    2018 April 24 Illustration Art Signature Auction - Dallas
    REALIZED $1,407,487