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#mammal evolution #mammal ancestry #mammal-like reptile #evolutionary lineage #therapsid #reptile to mammal

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#dimetrodon #pelycosaur #sailback #early synapsid #mammal-like reptile

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#therapsid #synapsid #mammal-like reptile #endothermy #warm-blooded #prehistoric physiology #permian

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#therapsid #synapsid #mammal-like reptile #differentiated teeth #mammal evolution #prehistoric features