- extinct reptiles of the Permian to Jurassic considered ancestral to mammals ...
A possible later stone age painting of a dicynodont (Synapsida) from the South African Karoo (IMAGE)
Credit must be given to the creator.
Data Source Smithsonian Libraries Topic Pelycosauria Therapsida siris_sil_131703 SIL SYNAPSIDA : A NEW LOOK INTO THE ORIGINS OF MAMMALS JOHN C MCLOUGHLIN Smithsonian Libraries ...
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