18 nov 320000000 av. J.-C. - Beginning of pelycosaur reign
Description:
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.Ajouté au bande de temps:
Date:
18 nov 320000000 av. J.-C.
Maintenaint
~ Il y a 5883516 ans
