A reptile of a group characterized by a lack of temporal openings in the skull, including the turtles and their relatives and many early fossil forms.
Sometimes placed in a subclass Anapsida, though this taxon is now often not recognized
- ‘All members of the group called the Reptilia, except for the anapsids (turtles and their ilk), and a few extinct groups, are diapsids.’
- ‘If anything, the synapsids seem more closely related to anapsids than diapsids.’
- ‘Today, only one group of anapsids remains (Chelonia - the turtles), which truly could be called an evolutionary success story.’
- ‘Therefore, a long hiatus exists in the fossil record of anapsids.’
- ‘The relationships of more basal anapsids are not firmly established, but millerettids apparently appeared first.’
1930s from modern Latin Anapsida, from Greek an- ‘without’ + apsis, apsid- ‘arch’.