clado-, clad- (Greek klados: shoot, young branch; branch; twig).
A monophyletic taxon; a group of organisms which includes the most recent common ancestor of all of its members and all of the descendants of that most recent common ancestor.
The development of a new clade; the splitting of a single lineage into two distinct lineages; speciation.
A diagram, resulting from a cladistic analysis, which depicts a hypothetical branching sequence of lineages leading to the taxa under consideration. The points of branching within a cladogram are called nodes. All taxa occur at the endpoints of the cladogram.