Brightmoon
Apes and humans are all in family Hominidae.
- Mar 2, 2018
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mammals ARE synapsids. we never evolved out of that lineage . The ancestral synapsid jaw, just like a modern reptile jaw ,had more than one bone . The jaw didn’t become less mobile in mammals, some of which can chew . ancestral synapsids, like the classic reptiles, can’tWhat happened was two middle ear bones were created to move the jaw up and close the space between the ears and jaw. In the process, an extra jaw bone was lost. This created a tradeoff: reduced mobiilty of the jaw to gain better hearing. Synapsid just means the animal has two holes on each side of the skull so I don't think they are necessarily related developments.
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