Incoming links: Amphibian
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.
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: 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.