What does phylogeny mean?
Phylogeny is the evolutionary history of organisms or languages, especially the branching relationships that resulted from common ancestry. In biology, it can refer either to the historical process itself or to the branching tree inferred from evidence such as anatomy, fossils, and DNA. A simple diagram may depict many kinds of organisms, while a detailed phylogeny can resolve species into increasingly close groups. The concept is central to systematics and evolutionary biology because it helps researchers determine which organisms are more closely related and reconstruct ancestral traits. Phylogeny is also used more narrowly in linguistics for the descent of languages from common ancestors. The word should not be confused with genealogy: genealogy traces particular people or families, whereas phylogeny generally concerns broader evolutionary descent. Although the plural “phylogenies” is valid, it is much less frequently encountered than the singular form.
nounThe evolutionary history and branching relationships among organisms or groups of organisms. The term may also refer to the historical development or descent of a group of languages.
- The evolutionary history of organisms or groups of organisms, especially the pattern of descent and branching among them.
- The inferred branching tree that represents those evolutionary relationships.
- The historical development and descent of a group of languages from earlier forms.
"The researchers used DNA evidence to reconstruct the phylogeny of the penguin family."
"Genetic data helped scientists determine the phylogeny of several closely related bird species."
"The study examines the phylogeny of several Romance languages from their common ancestor."
The plural is grammatically standard but uncommon.
"The researchers compared the phylogenies of flowering plants and insects."
A phylogeny is the hidden family tree of life, reconstructed from the traces that organisms have left in DNA, anatomy, and fossils.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does phylogeny come from?
The word entered English in the early 19th century from New Latin, itself formed from Greek phūlon, meaning “race” or “tribe,” and the combining form -genia, meaning “birth” or “origin.” Its development reflects the emerging scientific study of evolutionary descent. It shares the Greek phūlon element with biology and the phyletic group, while the -genia element connects it with words such as genetic and biogenesis.
Related word forms
How phylogeny is actually used
In biology, “phylogeny” usually names the evolutionary history or branching pattern itself, while “phylogenetic” is the corresponding adjective, as in “phylogenetic analysis.” The plural “phylogenies” is grammatical but uncommon.
Easily confused with phylogeny
Phylogeny concerns the evolutionary branching relationships of populations or species, whereas genealogy traces individual or family descent.