amniotes

The three higher classes of vertebrates which we call the amniotes -- the mammals, birds, and reptiles -- are notably distinguished by a number of peculiarities of their development from the five lower classes of the stem -- the animals without an amnion (the anamnia).

The Evolution of Man — Volume 1 Ernst Heinrich Philipp August Haeckel 1876

Mammals and reptiles are both amniotes, that is, they both have amnions.

A New Book 2010

It consists of the common ancestor to all modern amniotes, and all of its descendants, so the characteristic is BEING RELATED BY DESCENT TO THE COMMON ANCESTOR OF ALL AMNIOTES.

A Disclaimer for Behe? 2009

Mammals, reptiles and their common ancestors are sets nested within the superset amniotes.

A New Book 2010

It is instead defined by a combination of the features it has and the features it lacks: reptiles are the amniotes that lack fur or feathers.

A Disclaimer for Behe? 2009

At best, the cladists suggest, we could say that the traditional Reptila are 'non-avian, non-mammalian amniotes'.

A Disclaimer for Behe? 2009

Synapsids (mammal-like reptiles) are the branch of amniotes leading to mammals.

A New Book 2010

Yes and amniotes are so called based on their CHARACTERISTICS.

A New Book 2010

Also amniotes are so called based on CHARACTERISTICS.

A New Book 2010

Clue: Mammal-like reptiles are also amniotes. angryoldfatman: So to prove common descent, we presume common descent.

A New Book 2010

The skin is the oldest ever found for a group of animals collectively known as amniotes1, which includes reptiles, birds and mammals — all terrestrial vertebrates except amphibians.

This is the oldest fossilized reptile skin ever found — it pre-dates the dinosaurs Emma Marris 2024

Tracks in Australia seem to be the earliest known prints of amniotes — a group that includes reptiles, birds and mammals.

Fossil claw marks show reptiles arose much earlier than thought Rita Aksenfeld 2025