As synapsids continued to evolve during the Permian Period, however, they lost their belly ribs. Creatures like our cynodont ...

The Museum’s collection contains over 3,000 specimens, including a large amount of material from Africa. The Synapsid and Parareptile Collection includes both non-mammalian synapsids and Mesozoic ...

Amniotes began to radiate in the Carboniferous into many niches previously held by amphibians, plus new niches. The initial split was into synapsids (mammals and their relatives) and sauropsids ...