Mosasaur Fossil Skeleton Mosasaurus platycarpus Cretaceous Niobrara Chalk Formation...

Description

Mosasaur Fossil Skeleton
Mosasaurus platycarpus
Cretaceous
Niobrara Chalk Formation
Kansas, USA

Dominating the great Western Interior Seaway that once divided North America during the Late Cretaceous Period, Mosasaurs reigned as the undisputed apex predators of their marine realm, while dinosaurs commanded the terrestrial world. These powerful reptiles, with their elongated, serpentine bodies and jaws lined with razor-sharp, conical teeth, propelled themselves through the water with rapid, sinuous motions—an elegant yet deadly adaptation that made them masters of pursuit and ambush.

Specimens out of the famed Niobrara Chalk Formation are renowned for their scientific importance but are often preserved in soft, friable Limestone, necessitating careful stabilization in matrix and plaster. In the present example, an extraordinary degree of preparation has been achieved: the entire skeleton has been expertly extracted from its native rock and repositioned within a meticulously crafted faux matrix, allowing for a striking three-dimensional display. The skull, presented in full relief, exhibits remarkable completeness and preservation, revealing the formidable anatomy of this ancient marine hunter.

A refined, two-toned rendering traces the elegant bodyline of the creature, enhancing both scientific clarity and aesthetic impact. The specimen is mounted on a custom steel framework, designed for secure and effortless wall installation. The skeleton, measuring approximately 20 feet (6 meters) in length, with a skull of 22 inches (56 cm), is a spectacular presentation that unites natural history and fine art—an exceptional centerpiece for even the most distinguished fossil collection. This exceptional specimen comprises two sections, which are designed to be joined together to create an immense and impressive display specimen. There is minor cracking to the exterior of the wooden channel frame, which can be repaired to improve the overall appearance.
Overall Measurements: 268.00 x 51.00 x 12.00 inches (680.72 x 129.54 x 30.48 cm)

Provenance: Property of a Distinguished Southern California Collector

More Information: All items are offered "as is." While every effort has been made to accurately describe each lot, certain pieces—particularly fossils, minerals, and carvings—may exhibit minor imperfections, repairs, restorations, or natural wear consistent with age, excavation, or handling. Prospective buyers are encouraged to carefully review photographs and descriptions and to request additional condition information prior to bidding.


Estimate: $120,000 - up.

*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.