What is Anapsid?
[[File:Skull anapsida 1.png|thumb|right|230px|General diagram of the anapsid skull.]] An '''anapsid''' is an [[amniote]] whose skull does not have openings on the sides behind the eyes.<ref>Pough F.H. et al. 2002. ''Vertebrate life'', 6th ed. Prentice Hall, NJ. {{ISBN|0130412481}}</ref> This is #A primitive ('basal') condition for early amniotes in the [[Mississippian]] (early [[Carboniferous]]). #A secondary ('derived') condition of some other reptile groups, probably including [[turtle]]s ([[Chelonia]]). Some other groups were anapsids, such as the [[mesosaur]]s. == References == {{Reflist}} {{biology-stub}} [[Category:Tetrapods]]