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  • Merycoidodon culbertsoni


    Images:

    ParkerPaleo

    Taxonomy

    Oreodont

    Kingdom: Animalia
    Phylum: Chordata
    Class: Mammalia
    Order: Artiodactyla
    Family: Merycoidodontidae
    Genus: Merycoidodon
    Species: Merycoidodon culbertsoni
    Author Citation Leidy

    Geological Time Scale

    Eon: Phanerozoic
    Era: Cenozoic
    Period: Paleogene
    Sub Period: None
    Epoch: Oligocene

    Stratigraphy

    White River Formation

    Provenance

    Acquired by: Field Collection

    Location

    Converse
    Wyoming
    United States

    Comments

    Merycoidodon ("ruminating teeth") is an extinct genus of herbivorous artiodactyl of the family Merycoidodontidae, more popularly known by the name Oreodon ("hillock teeth"). It was endemic to North America during the Late Eocene to Early Miocene (46—16 mya) existing for approximately 30 million years.

     

    Merycoidodon would have somewhat resembled a pig in appearance, but had a longer body, at about 1.4 metres (4.6 ft), and short limbs. The fore limbs had five toes (although the first one was vestigial), while the hind limbs had four. Given the shape of the limbs, it is unlikely that the animals would have been able to run fast. Unlike modern ruminants, they had a full set of teeth, although the molars were adapted for grinding up tough vegetation. Notably, they had strong, and very striking, canines.

    The skulls of Merycoidodon have a pit in front of the eyes. Similar pits are found in the skulls of modern deer, where they contain a scent gland used for marking territory. Although Merycoidodon was not directly related to deer, it seems likely that it possessed a similar gland, which may imply that it, too, was territorial.  Oreodonts lived in large herds and moved about from place to place. They seem to have had a predilection for well-watered regions, where food was plentiful and succulent. The number of fossils found implies that, at one time, oreodonts were as plentiful in South Dakota as zebras are today on the serengeti plains.




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