Definition of "anapsid" [anapsid]

• Any amniote whose skull does not have openings near the temples. (noun)

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• "Mesasaurs were small crocodilian-like anapsid reptiles of about 300 million years ago."
• "This is where Lenny caustically suggested that I was a YEC for not knowing that turtles had been reclassified as diapsids with a secondarily anapsid appearing skull I hope that embryologically turtle skulls start off as diapsid and then change but I dont really know."
• "It doesnt seem likely that anapsid skulls are all secondarily derved from diapsids."