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Probably the question of WHEN it lived would be more appropriate than where. However, I can tell you that most of its fossils are found in the western desert areas of North America, many in North-Central Texas, New Mexico, and the four corners areas. Exactly what part of Pangea that might have been at the time they were around, I fear I don't know.

Dimetrodon was NOT a dinosaur. It was a mammal-like reptile - a type classified as a Synapsid - and was probably at the top of the food change during its existence. Those animals lived many long years prior to the emergence of the dinosaurs, hitting their peak in the early Permian period (the last period of the Paleozoic Era) and dying out maybe 45 million years before the first little dinosaurs showed up. It died out before the end of the Permian period, and that period ended with a terrible crash. 95 percent of life on this planet was eliminated in the deadliest mass extinction ever to strike living things on this earth and it closed both the Permian period and the Paleozoic Era.

The initial period of the Mesozoic Era - the era of the dinosaurs - was the Triassic. It began quietly. Very few animals or plants survived the calamities that annihilated so much of the Permian life, and the complete re-population of the earth and its oceans took a few million years. The first dinosaurs didn't appear until the Triassic was well underway and they didn't hit their heyday until the Jurassic.

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12y ago

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