How to read a phylogenetic tree

Dave Hone's Archosaur Musings

Nowadays even the media seem quite happy to occasionally put up a phylogenetic tree as part of their scientific coverage, and they are proliferating on the internet on websites, research papers and blogs, in addition to books and magazines. However, while it is hardly difficult to get the gist of a tree, there is a certain skill and amount of knowledge that needs to go into pulling out all of the information correctly from a tree. It is easy to make mistakes about what a tree actually tells you so hopefully I can clear up a few misconceptions about tree creation and how trees should be read.

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