Mammal-Like Reptiles
September 4, 2010 |18:02 | Mammals News By : Team X
Amniotes are the group of the vertebrates that evolved from early tetrapod amphibians, and developed eggs suited to life in a terrestrial environment. They are believed to have evolved during the early Carboniferous period, perhaps around 340 million years ago. They are subclassified into various groupings based on the design of their skulls (or in some cases the skulls of their ancestors).
* Anapsids are amniotes with solid box-like skulls. Many early reptiles, like Scutosaurus were of this type. Additionally, it is possible, although it is not entirely clear whether turtles fall within this group - they may be anapsids (they have the right skull type), or they may be diapsids (see below) which re-evolved an anapsid-type skull.

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