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Name origin: <amnion>, a pellicle that covers embryos of both <eggs> and also during <pregnancy>.

Includes:
* <sauropsida>: <reptiles> and <birds>, which really are reptiles
* <mammals>, or if you want to include a bunch of extinct non-reptile mammal ancestors, <synapsids>.

Does not include <amphibians>. If you include them, you have the <tetrapods>.


Amniote

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Includes:
* <amphibians>
* <amniotes>, which includes:
  * <sauropsida>: <reptiles> and <birds>, which really are reptiles
  * <mammals>

The exact relationships between those clades is not very clear as there's a bunch of <extinct> species in the middle we are not sure exactly where they go exactly, some hypothesis are listed at: https://en.wikipedia.org/w/index.php?title=Tetrapod&oldid=1053601110#Temnospondyl_hypothesis_(TH)

But at least it seems rock solid that those three are actually clades.


Ciro Santilli @cirosantilli 36

 Incoming links: Amphibian