| An anapsid is an amniote whose skull does not have openings near the temples.
While "anapsid reptiles" or "anapsida" were traditionally spoken of as if they were a monophyletic group, it has been suggested that several groups of reptiles that had anapsid skulls may be only distantly related. Scientists still debate the exact relationship between the basal (original) reptiles which first appeared in the late Carboniferous, the various Permian reptiles which had anapsid skulls, and the Testudines (turtles, tortoises, and terrapins).
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|† Adocus||Big-headed turtle||Eurasian pond turtles|
|Marsh turtles||† Horned turtles||Mud and Musk turtles|
|† Odontochelys||† Pareiasaurs||† Proganochelys|
|Sea turtles||Side-necked turtles||† Sinemys|
|Snapping turtles||Softshelled turtles||Tortoises|