Anapsid
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An anapsid is an amniote whose skull lacks one or more skull openings near the temples. Traditionally, the Anapsida are considered the most primitive subclass of amniotes, the ancestral stock from whi
Anapsid skull of Caretta caretta (loggerhead sea turtle), a testudine
Mesosaurus BW
Milleretta BW
Hovasaurus BW
Turtle
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Turtles are reptiles characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira and Cryptodira, which differ in the way the hea
Anapsid
…between the basal (original) reptiles that first appeared in the late Carboniferous, the various Permian reptiles that had anapsid skulls, and the Testudines (turtles, tortoises, and terrapins). However, it was later suggested that the anapsid-like turtle skull is due to reversion rather than to anapsid…
Turtle diversity
Indian tent turtle
Sea turtles have streamlined shells and limbs adapted for fast and efficient swimming.
The red-eared slider has an exceptional seven types of color-detecting cells in its eyes.