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During the Isu Era, Autochthonos served as one of Archons of Atlantis, handling the city's agriculture. He worked together with the botanist Neokles to create fertile lands for crops to feed the citizens of Atlantis and other cities.
Autochthonos was also responsible with supplying food to the Olympos Project, a scientific exercise conducted by Aita and Juno to develop a number of hybrid beasts. However, he was unaware of the project's true purpose and the reason for the huge demand of food supply.
- Autochthonos is mentioned by Plato in Critias as one of the ten kings of Atlantis and the twin brother of Mneseas.