A taxon that includes a common ancestor, all descendants of that ancestor, and no other organisms is considered to be monophyletic.
In monophyletic taxon, a group is composed of a collection of organisms, which includes the most recent common ancestor of all those organisms and all the descendants of that most recent common ancestor. A monophyletic taxon is also termed as clade. Example of a monophyletic group- one group comprised of humans, apes, and new world monkeys, they share the most common recent ancestral group, which is the old-world monkeys. Monophyletic group includes a node. All of the descendants of that node is represented by both nodes and terminal taxa.
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