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Fossil Horse Jaw Section (Mesohippus bairdi) | Brule Formation, Oligocene | South Dakota USA | Authentic Specimen w/ COA
Fossil Horse Jaw Section (Mesohippus bairdi) | Brule Formation, Oligocene | South Dakota USA | Authentic Specimen w/ COA - Image 2

Fossil Horse Jaw Section (Mesohippus bairdi) | Brule Formation, Oligocene | South Dakota USA | Authentic Specimen w/ COA

£84.00

This listing is for a 100% genuine fossilized horse jaw section from the extinct species Mesohippus bairdi, sourced from the renowned Brule Formation of South Dakota, USA. Dated to the Oligocene Epoch (~33.9 to 23 million years ago), this specimen offers a unique glimpse into the evolutionary history of North American equids.

The Mesohippus was a transitional species in horse evolution, standing approximately 60 cm (24 in) tall at the shoulder. It was among the first equids to develop three toes on each foot and displayed more advanced teeth suited for browsing in open woodlands. The jaw section shows these characteristic dental features, making it a valuable specimen for collectors, educators, and enthusiasts alike.

Origin & Formation Details:

  • Species: Mesohippus bairdi
  • Family: Equidae
  • Order: Perissodactyla
  • Geological Formation: Brule Formation
  • Depositional Environment: Semi-arid floodplain with seasonal wetlands
  • Geological Age: Oligocene Epoch (specifically Chadronian to early Orellan stage)
  • Location Found: South Dakota, United States
  • Authenticity: Comes with a Certificate of Authenticity

Notable Morphology:

  • Partial lower jaw with preserved molars and premolars
  • Displays evolutionary adaptations such as low-crowned teeth for browsing
  • Specimen reflects typical light to mid-brown fossilization coloration

Scale & Display Info: Scale cube in photo = 1cm. Please refer to listing photo for exact size and visual reference of the fossil you will receive. Each fossil is hand-selected to closely match the quality and morphology shown in the photo.

This fossil is a stunning educational display piece and a meaningful addition to any paleontological collection. Ideal for collectors, educators, and natural history lovers seeking a piece of genuine prehistoric life.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

(Actual as seen)

Only 1 left in stock

SKU: FSR009 Category:

Description

This listing is for a 100% genuine fossilized horse jaw section from the extinct species Mesohippus bairdi, sourced from the renowned Brule Formation of South Dakota, USA. Dated to the Oligocene Epoch (~33.9 to 23 million years ago), this specimen offers a unique glimpse into the evolutionary history of North American equids.

The Mesohippus was a transitional species in horse evolution, standing approximately 60 cm (24 in) tall at the shoulder. It was among the first equids to develop three toes on each foot and displayed more advanced teeth suited for browsing in open woodlands. The jaw section shows these characteristic dental features, making it a valuable specimen for collectors, educators, and enthusiasts alike.

Origin & Formation Details:

  • Species: Mesohippus bairdi
  • Family: Equidae
  • Order: Perissodactyla
  • Geological Formation: Brule Formation
  • Depositional Environment: Semi-arid floodplain with seasonal wetlands
  • Geological Age: Oligocene Epoch (specifically Chadronian to early Orellan stage)
  • Location Found: South Dakota, United States
  • Authenticity: Comes with a Certificate of Authenticity

Notable Morphology:

  • Partial lower jaw with preserved molars and premolars
  • Displays evolutionary adaptations such as low-crowned teeth for browsing
  • Specimen reflects typical light to mid-brown fossilization coloration

Scale & Display Info: Scale cube in photo = 1cm. Please refer to listing photo for exact size and visual reference of the fossil you will receive. Each fossil is hand-selected to closely match the quality and morphology shown in the photo.

This fossil is a stunning educational display piece and a meaningful addition to any paleontological collection. Ideal for collectors, educators, and natural history lovers seeking a piece of genuine prehistoric life.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

Additional information

Era

Oligocene
Origin

USA

Oligocene Information

The Oligocene Epoch (33.9–23 million years ago) was a time of cooling climates and the transition to more modern ecosystems. Following the warm Eocene, global temperatures dropped, leading to the expansion of grasslands and the first permanent Antarctic ice sheets. Forests shrank, and grazing mammals like early horses, deer, and rhinos thrived in open landscapes. Primates evolved, with the ancestors of monkeys and apes appearing. In the oceans, whales diversified, and the first seals emerged. The Oligocene also saw the formation of major ocean currents, which further shaped Earth's climate. This period set the stage for the Miocene, with continued cooling and the rise of more modern mammal species.

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