Very Rare Hyaenodon Skeleton Museum Fossil

Hyaenodon sp.

Class Mammalia, Order Creodonta, Family Hyaenodontidae

Geological Time: Oligocene – (35 million years ago)

Size: Skeleton dimensions: Length 59 cm (23”) Width 30 cm (12”) Skull dimensions: Length 20 cm (8”) Depth 7.5 cm (2 ¾”)

Fossil Site: Upper Brule Formation, White River Badlands, Chadron Nebraska Area

Fossil Code: PFV131

Price: $12,500.00 - sold


Hyaenodon FossilDescription: Let the photos speak for themselves regarding the visual impact of this stunning specimen. This is truly a remarkable museum grade fossil find of an Oligocene find Hyaenodon (meaning "hyaena-toothed"). Though White River mammal fossils are not uncommon, mostly complete skeletons are rare, and Hyaenodons rarer still. Preserved are the skull, backbone, ribs, front legs, shoulder blade and sections of the back legs. Need I mention how many hours of conservation went into preparing this specimen? While some fossil dealers throw around the term “museum quality” and “centerpiece”, like confetti, this one, in my opinion, unequivocally deserves such an accolade.

The badlands of the western US are particularly rich in Hyaenodonmammal fossils from the late Eocene to Miocene. The Brule Formation is exposed over a huge area including Nebraska, North and South Dakota, Wyoming, and Colorado, and yields abundant fossils as layers are eroded. This diverse group of stocky prehistoric mammals grazed amid the grasslands, prairies or savannas of North and Central America throughout much of the Cenozoic era.

Hyaenodon Fossil SkullHyaenodons belong to an extinct group of mammals called creodonts that were a dominant and diverse group of mammalian predators during the Eocene and Oligocene. There are two families of creodonts. The oxyaenids were generally small-bodied forms with short limbs that became extinct at the end of the Eocene. The Hyaenodontidae (named by Leidy) had longer limbs. They were more diverse, longer-lived and more widely distributed. Hyaenodonts were greatly reduced in the late Oligocene, but one genus from Asia survived into the Pliocene.

Creodonts were more primitive than the true carnivores. Although their teeth were clearly adapted for eating meat, they were less specialized than those of the carnivores. Their limbs were also not as well adapted for running. Many paleontologists believe that they were unable to cope with the faster ungulates that appeared at the beginning of the Miocene.

Please note that a specially prepared metal display stand will accompany this Hyaenodon with the purchase.

Fossil Sales Information

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