monophyletic

clade A group defined by at least one shared derived character or synapomorphy inherited from a common ancestor; a monophyletic higher taxon, a branch on a cladogram.

进化枝由同祖先演化产生生物群在演化分枝图上分支。

polyphyletic Refers to a group of species that do not have one common ancestor species. Species may be grouped polyphyletically as a convenience until a monophyletic classification can be made.

复系指有同祖先族群。在便利性之下，种可能来自多祖先谱系群集，直到单源分类能被创立。