Oligocene Mammals - Brule Formation
During the Early Oligocene, there were abundant land mammals in North America. Today, their fossil remains are found in the Brule Fm. The Brule Fm. is located in the northwestern US and was deposited between 33 and 30 million years ago (Rupelian age).
The following Brule Fm. mammals are posted:
Hesperocyon gregarius - an early dog-like mammal
Hyracodon nebraskensis - an early Rhinoceras
Ischyrmys sp. - a ground squirrel
Leptomeryx evansi - an early deer-like hornless Ruminant
Merycoidodon culbertson - an Oreodeont
Merycoidodon gracilis - an Oreodeont
Mesohippus - an early 3-toed horse
Palaeolagus haydeni - a rabbbit
Poebrotherium wilsoni - an early cmael
- Leptomeryx evansi - Extinct Deer-Like Ruminant$50.00
An extinct early Deer-like Ruminant jaw (Leptomeryx evansi) from Sioux Co., Nebraska. Leptomeryx was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed.
WR32 Size: 1-3/4"
Name: Leptomeryx evansi
Age: Oligocene
Location: Sioux Co., Nebraska
Note - Posting 49 Oligocene Mammal fossils in January 2025. Link to Oligocene Mammal Fossils
Learn More - Hesperocyon gregarius - Extinct Dog-like Canid$50.00
An extinct early Dog-like Canid jaw (Hesperocyon gregarius) from Sioux Co., Nebraska. Hesperocyon gregarius was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed. This item comes witha 2"x 2" floating frame display.
WR46 Size: 15/16"
Name: Hesperocyon gregarius
Age: Oligocene
Location: Sioux Co., Nebraska
Note - Posting 49 Oligocene Mammal fossils in January 2025. Link to Oligocene Mammal Fossils
Learn More - Hesperocyon gregarius - Extinct Dog-like Canid$50.00
An extinct early Dog-like Canid jaw (Hesperocyon gregarius) from Sioux Co., Nebraska. Hesperocyon gregarius was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed. This item comes witha 2"x 2" floating frame display.
WR45 Size: 1"
Name: Hesperocyon gregarius
Age: Oligocene
Location: Sioux Co., Nebraska
Note - Posting 49 Oligocene Mammal fossils in January 2025. Link to Oligocene Mammal Fossils
Learn More - Palaeolagus haydeni$45.00
An extinct early rabbit jaw (Palaeolagus haydeni) from Sioux Co., Nebraska. Palaeolagus was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed. This item comes witha 2"x 2" floating frame display.
WR22 Size: 3/4"
Name: Palaeolagus haydeni
Age: Oligocene
Location: Sioux Co., Nebraska
Note - Posting 49 Oligocene Mammal fossils in January 2025. Link to Oligocene Mammal Fossils
Learn More - Hesperocyon gregarius - Extinct Dog-like Canid$45.00
An extinct early Dog-like Canid molar (Hesperocyon gregarius) from Sioux Co., Nebraska. Hesperocyon gregarius was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed.
WR48 Size: 1-1/4"
Name: Hesperocyon gregarius
Age: Oligocene
Location: Sioux Co., Nebraska
Note - Posting 49 Oligocene Mammal fossils in January 2025. Link to Oligocene Mammal Fossils
Learn More - Hyracodon nebraskensis - Extinct Running Rhinoceras$20.00
An extinct early Running Rhinoceras tooth (Hyracodon nebraskensis) from Sioux Co., Nebraska. Hyracodon nebraskensis was one of many mammals that thrived in the Early Oligocene in North America. Found in the Brule Fm. (Rupelian) 33 - 30 million years ago. A very well preserved specimen. No repair or restoration. Authenticity guaranteed.
WR55 Size: 1-1/2"
Name: Hyracodon nebraskensis
Age: Oligocene
Location: Sioux Co., Nebraska
Note - Posting 49 Oligocene Mammal fossils in January 2025. Link to Oligocene Mammal Fossils
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