+**Therapsids** were a diverse group of [Synapsids](/wiki/synapsid) that flourished from the Permian into the Triassic periods. Often called 'mammal-like reptiles,' these ancient creatures represent the evolutionary lineage leading directly to all true [Mammals](/wiki/mammal). They evolved many mammal-like traits, including differentiated teeth and more upright limbs.
+## See also
+- [Permian](/wiki/permian)
+- [Triassic](/wiki/triassic)
+- [Evolution](/wiki/evolution)
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