A clade or monophyletic group is easy to identify visually: it is simply a piece of a larger tree that can be cut away from the root with a single cut (Figure 4a).

Australian and South American marsupials are color coded. As you can see, Dromiciops, Monito del Monte, is nested within the monophyletic clade which includes all the Australian mammals.But, the ...

Most of the 470-million-year history of plants on land belongs to bryophytes, pteridophytes and gymnosperms, which eventually yielded to the ecological dominance by angiosperms 90 Myr ago1,2,3.