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Because the tooth rows are deeply inset from the outside of the jaws
the first time such evidence was obtained for a dinosaur
The snout curved slightly upward and was rounded at the tip
The evidence has mostly been based on that of Turkana Boy discovered in 1984
The distribution of Glossopteris across several
Macrauchenia, skull Posters Because the tooth rows areMacrauchenia was a long necked and long limbed, three toed South American ungulate mammal, typifying the order Litopterna. The oldest fossils date back to around 7 million years ago, and M. patagonica disappears from the fossil record during the late Pleistocene, around 20,000 years ago. M. patagonica was the best known member of the family Macraucheniidae, and is known only from fossil finds in South America, primarily from the Lujan Formation in
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