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

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.