A Dimetrodon is an Dinosaur with a fin that only appears in The Land Before Time.


Dimetrodon only appears in the original Land Before Time, when Littlefoot, Ducky, and Petrie hide from one crossing their path. As the Dimetrodon passes it flicks out its tongue like a snake or monitor lizard and hisses.


  • Although portrayed as living durnig the Creatcouss period, Dimetrodon actually lived during the Permian Peroid

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