18 ноя 320000000 г. до нашей эры - Beginning of pelycosaur reign
Описание:
Pelycosaurs are a sister group to all other synapsids. They show some mammal-like characteristics, and often have "sails," presumably to aid in thermal regulation. Therapsids branched off from pelycosaurs, and the two remained in competition until about 275 mya.
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Дата:
18 ноя 320000000 г. до нашей эры
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~ 5883516 г назад