Dictionary > Paraphyletic

Paraphyletic

Definition
adjective
A biological taxonomy that pertains to a certain group of organisms does include some but not all of the descendants from the common ancestors.
Supplement
Paraphyletic occurs when all descendants of the last common ancestor of the group members separate to form another groups. Like for example in class Reptilia as conventionally delineate, are paraphyletic since it excludes the two groups of its descendants, the class Aves and class Mammalia wherein birds are descended from dinosaurs of which classified as reptiles and mammals from mammal-like reptiles. Other usually known paraphyletic groups include fish and lizards.
A Paraphyletic group is frequently raised on the basis of ancestral similarities rather than derived similarities. The presence of paraphyletic in cladistics school of taxonomy is an adequate sacrifice if it makes taxonomy more reasonable and is needed to encompass a comprehensive classification together with that of extinct group since every species originates from part of another.
Paraphyletic is used when studying significant traits that led a subclade in an evolutionary divergent from more inclusive clade since it is always useful to consider the paraphyletic group without taking into consideration the larger clade.
Compare:
monophyletic
polyphyletic
See also:
phylogenetics
taxonomy
• cladistics
Related terms:
• paraphyly (noun)
• paraphyletically (adverb)


You will also like...

Lights' Effect on Growth
Lights’ Effect on Growth

This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..

Population Growth and Survivorship
Population Growth and Survivorship

This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..

Birth Control and Contraception
Birth Control and Contraception

Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

Oligodendrocyte and Schwann cell
The Central Nervous System

Myelin sheath is essential for a faster conductivity of signals. Know more about this feature of some neurons in the Cen..

Control of body movement
Control of Body Movement

Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..

Stem
Stems

Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

Related Articles...

No related articles found

See all Related Topics