As an adjective paraphyletic
is of a defined group of taxa, not including all descendants of the common ancestor of all members.
As a noun plesiomorphy is
a character state that is present in both outgroups and in the ancestors.
paraphyletic
English
Adjective
(-)
(systematics) Of a defined group of taxa, not including all descendants of the common ancestor of all members.
Usage notes
* Paraphyletic groups are not clades and are therefore likely to be superseded systematic taxonomy, though they may be used for convenience for some time, especially if they correspond to an intuitively appealing group. An example is the lay concept of fish, one definition of which includes mammals, such as whales, as well as sharks, sturgeon, and scaled fish, the common ancestor of which is some ancestral vertebrate, from which amphibians and reptiles are also descended.
Related terms
* monophyletic
* paraphyly
* polyphyletic
plesiomorphy
English
Noun
(plesiomorphies)
(cladistics) A character state that is present in both outgroups and in the ancestors
See also
*apomorphy
Anagrams
*
