A large passive herbivore, Scutosaurus——literally “shield lizard”—weighs about 5.5 tons. Loosely related to the turtle, this creature is based on a heavily armored reptile called “Scutosaurus kapinski,” which lived 250 million years ago in Russia. Smaller than its fictional counterpart, the real species probably weighed closer to one ton. Because of its plant-based diet, Scutosaurus likely lived near riverbanks and floodplains.

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