• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

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  • Trail Closure Information

    The Highland Creek Trail is closed. Backcountry Zones 1 and 2 are closed to all off-trail travel and use. The Sanctuary and Centennial Trails remain open to through traffic.

  • Temporary Road Closure Information

    Oct. 18 & 19: NPS 5 and 6 are closed for the entire weekend. Monday, Oct. 20, through Wednesday, Oct. 22, NPS 5 will be closed from Highway 87 to NPS 6. Highway 87 will be closed from Road 342 (Beaver Creek Road) north to the park boundary.

Centennial Paleontology Site - Rhinoceros Skeleton

Subhyracodon Skeleton
Subhyracodon Skeleton
Subhyracodon Reconstruction
Subhyracodon Reconstruction

Extinct Hornless Rhino

Subhyracodon was a cow-sized rhinoceros that lived from the early Chadronian to the Whitneyan (39-30 mya) primarily in the central Great Plains region of North America. During this time period, rhinocerotids occupied the large bodied herbivorous niches in North America. Subhyracodon is recognized by its saddle shaped skull with paired nasal ridges. The Subhyracodon is a hornless rhino. The cheek teeth of rhinocerotids are characterized by a pi shaped surface for grinding up tough vegetation. Field identification of postcranial material of Subhyracodon is often recognized by its size and robustness compared to other taxa within a deposit.

For more information about the Centennial Site click on the links below.

Site Map
Rhinoceros Skeleton
Rhinoceros Skull
Mesohippus Skeleton
Excavating the Site in 2003
Excavating the Site in 2004
Jacketing Fossils
Jacketing Large Fossils
Moving the Jacketed Fossils
Centennial Paleontology Site Overview

Read the press release about the discovery.

Did You Know?

Stemless Hymenoxys

The scientific name for the Stemless Hymenoxys is Hymemoxys acaulis. Acaulis means "stemless" and referes to the leafless stalks which bear the flower heads. More...