Theosodon
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| Thesodon Fossil range: Early Miocene |
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| Theosodon lydekkeeri |
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Theosodon is an extinct genus of litoptern mammal.
The 2 m (6 ft 8 in) long creature bore a superficial resemblance the modern guanaco. It had a long neck and tapir-like three-toed feet. Judging from the position of its nostrils, Theosodon had a short trunk, though shorter than its other relatives from the Macraucheniidae family, namely Macrauchenia. Theosodon was discovered with a full set of teeth, and its jaws, namely its lower mandible, were very thin and large [1]. The number of dental bones found within this animal's remains were 44, which is the primitive condition of placental mammal dentition. Theosodon lived during the early Miocene.

