A member of the group Anapsida; an early reptile with a solid skull lacking temporal openings.
From Anapsida plus '-an' (member of a group). A paleontological classification term for individual members of this reptile group.
If you could travel back 300 million years and find an anapsidan, you'd be looking at one of your distant reptilian ancestors—though whether it's a 'real' reptile is still scientifically debatable.
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