Lystrosaurus was a pig sized dicynodont that was similar to Dicynodon .
Lystrosaurus moved in monster herds and ate up so much vegetation that they had to migrate constantly. They sometimes had to walk in single file so they were at danger to the smaller, but venomous therocephalians. It was also preyed on by the gorgonopsians like lycaenops, which was a relative of the huge synapsid, Gorgonopsid.
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