Monophyletic
In phylogenetics, a group is monophyletic (Greek: of one stem) if all organisms in that group are known to have developed from a common ancestral form, and all descendants of that form are included in the group.
monophyletic -- Term applied to 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. A monophyletic group is called a clade. More?
monophyletic group A group of organisms descended from a common ancestor. For example: your immediate family may be considered such a group, being descended from a common ancestral group (grandparents, etc.).
Monophyletic: Refers to a group of species that all have a single common ancestral species.
Morphology: The form and structure of an organism, in particular its outside features.
[edit] Monophyletic groups encouraged
Many cladists discourage the use of paraphyletic groups because they detract from cladisitcs' emphasis on clades (monophyletic groups).
monophyletic groups Groups that contain an ancestor and all the descendants of that ancestor.
monophyletic origin A group of organisms that evolved from a single ancestral type.
Monophyletic, paraphyletic, and polyphyletic trees
Taxonomists following cladistic analysis place taxa into clades based on the derived character states that the taxa share. For example, a wing is a character.
The Protists as they have been used traditionally do not comprise a monophyletic group. What lines of evidence support this statement?
Be able to list the features that support the statement that plants are descended from some group of green algae.
A species must be monophyletic and share one or more derived character. There are two meanings to monophyletic (de Queiroz and Donoghue 1988, Nelson 1989).
 See also: Organ, Evolution, Class, Animal, Animals
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