From the first Reptilia (reptiles) evolved:
The Sauropsida (sauropsids) with today`s Aves (birds), Crocodylia (crocodilians), Testudinata (turtles) and Lepidosauria (lepidosaurs).
The Synapsida (synapsids) with today`s Mammalia (mammals).

What kind of living beings are there, where do these beings live, how are the living beings related to one another?
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