18 Nov 320000000 Jahr v. Chr. - Beginning of pelycosaur reign
Beschreibung:
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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Datum:
18 Nov 320000000 Jahr v. Chr.
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~ 5883516 years ago