The anapsid reptiles, whose massive skull roofs had no postorbital holes, continued and flourished throughout the Permian.
From the en.wikipedia.org
The anapsid and synapsid reptiles were common during the late Paleozoic, while the diapsids became dominant during the Mesozoic.
From the en.wikipedia.org
The earliest amniotes were superficially lizard-like, but had solid, box-like skulls, with openings only for eyes, nostrils, termed the anapsid condition.
From the en.wikipedia.org
More examples
Primitive reptile having no opening in the temporal region of the skull; all extinct except turtles
(anapsida) oldest known reptiles; turtles and extinct Permian forms
An anapsid is an amniote whose skull does not have openings near the temples.
(Anapsids) a reptile group that includes turtles that have no skull openings behind the eye.
Reptiles that do not have holes on the sides of their skull.