Prehistoric Mobius is a location that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It is an alternate/past version of Mobius, known for its volcanic activity and absence of large plant life.
Prehistoric Mobius is a desolate and dangrous place, with plant life hard to come by. Mobosaurs, primitive Mobians, and Overlanders are the dominant animals on the planet. Its most notable inhabitants are Ivo Robughnik and the Prehistoric Freedom Fighters (including Sonugh the Boghog). It was briefly visited by Sonic the Hedgehog after he was caught in a trap by Dr. Robotnik. He narrowly escaped some Mobosaurs and was brought to safety thanks to Sonugh. With some convincing, Sonic was able to get the Prehistoric Freedom Fighters onto the surface to fight for survival before he returned to his time.