Encyclopedia > Anapsida

  Article Content


Redirected from Anapsida

The anapsids are a group of amniotes, characterized by skulls without openings near the temples. The only extant members are the Testudines - turtles, tortoises, and terrapins. Various other groups, however, are known from Permian and Triassic fossils. The anapsids have traditionally been treated as a subclass of the class Reptilia, but as this group is paraphyletic they are sometimes placed in a separate class Anapsida.

Most of the anapsid orders, including groups the, millerettids[?], nyctiphrurets[?] and pareiasaurs[?], were extincted in the late Permian period by the Permian-Triassic extinction event. Both the procolophonoids[?] and some ancient ancestors of the testudines managed to survive into the Triassic, and the testidunes are the only surviving order.

External links

Introduction to Anapsida (http://www.ucmp.berkeley.edu/anapsids/anapsida) from UCMP

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
Thomas a Kempis

... (i. 13, ii. 9, iii. 6, 59). In other works, however, Thomas Kempis exalts Mary as the queen of heaven, the efficient mediatress of sinners, and to her all should flee ...

This page was created in 41.1 ms