Overview

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Captorhinida is a doubly paraphyletic grouping of early reptiles. An anapsid is an amniote whose skull does not have openings near the temples. While anapsid reptiles or anapsida are 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). Many modern paleontologists believe the Testudines are descended from diapsid reptiles which lost their temporal fenestrae, although that view is not generally accepted (see Parareptilia for details and references).

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