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Pelycosauria


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(class Reptilia, subclass Synapsida)

An order of reptiles, dating from the upper Carboniferous and Early Permian, several of which sported large, sail-like, dorsal fins. There were both carnivorous and herbivorous types. They gave rise to and were replaced by the mammal-like reptiles (Therapsida).

Subjects: Earth Sciences and Geography — Zoology and Animal Sciences.


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