diversity of life

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


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).