Diphydontosaurus was a sphenodontian reptile from the Late Triassic of England (UK). This small animal was related to the living tuatara, which survives on the island of New Zealand. Diphydontosaurus may have hunted and eaten insects in the crevices of ancient caves. It may have grown to a length of 4 inches (10 centimeters).

Diphydontosaurus in The Land Before Time

Diphydontosaurus is one of the many creatures that watch Littlefoot's birth. One can be seen perched on a mound of earth above a pair of Sordes, appearing as a tan lizard-like creature.
LBT1 Creatures

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