Lystrosaurus

Genus of Late Permian and Early Triassic dicynodont therapsids

Lystrosaurus ('shovel lizard'; from Ancient Greek λίστρον lístron 'tool for leveling or smoothing, shovel, spade, hoe') is an extinct genus of herbivorous dicynodont therapsids from the late Permian and Early Triassic epochs (around 248 million years ago). It had a widespread distribution across Pangaea, with fossils having been found in what is now Antarctica, India, China, Mongolia, European Russia, South Africa, and possibly Australia and Mozambique. Four to six species are currently recognized, but from the 1930s to 1970s the number of species was thought to be much higher.

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