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In phylogenetics, basal members of a group diverged earlier than a subgroup of others (or vice versa). It is often used in opposition to the word derived. The following are example usages of the term basal:

Many biologists (especially those that use cladistics) now prefer to use "basal" instead of the word "primitive," which may imply inferiority. On the contrary, if a basal member of a group exists alongside derived members, it has had more time to evolve and is often better-suited to its environment than modern derivatives.

Alternatively, in botany, the term basal can mean "at the base of"; for example, the wild orchid genus Piperia have leaves that are entirely basally situated on stem.


Smallwikipedialogo.png This page uses content from Wikipedia. The original article was at Basal. The list of authors can be seen in the page history. As with Paleontology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.

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