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1. Of or relating to a group of taxa that does not include the common ancestor of all the members.
2. Of or derived from more than one stock or source.

pol′y·phy·let′i·cal·ly adv.
pol′y·phy′ly (pŏl′ē-fī′lē, pə-lĭf′ə-lē) n.


(Biology) biology relating to or characterized by descent from more than one ancestral group of animals or plants
[C19: from poly- + phyletic]
ˌpolyphyˈletically adv


(ˌpɒl i faɪˈlɛt ɪk)

descended from more than one ancestral line.
pol`y•phy•let′i•cal•ly, adv.
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References in periodicals archive ?
The insufficiency of data on shell fabric of this polyphyletic order comprising superfamilies of uncertain origin is obvious.
Asterisks indicate polyphyletic clades containing US strains and most recent strains from South Korea.
These phylogenetic studies also showed that the traditional Tournefortia is polyphyletic, with T.
viridis (Peters, 1852), originally defined just morphologically, were each shown to consist of three mitochondrial lineages in a polyphyletic arrangement (Trujillo et al.
Polyphyletic strains of Hepatitis E are responsible for sporadic cases of acute hepatitis in Japan.
They reworked the polyphyletic genus Agraecia, creating a new subtribe Agraeciina, that consists of 3 new genera: Iaratrox, Starkonsa, Yvelinula, along with Agraecia; the latter is left with just three species: Agraecia punctata Saint-Fargeau & Audinet-Serville, Agraecia dorsalis Karny and Agraecia agraecioides (Rehn 1911).
Phylogenetic analysis of ticks (Acari: Ixodidae) using mitochondrial genomes and nuclear rRNA genes indicates that the genus Amblyomma is polyphyletic.
Algae are a diverse group of photosynthetic organisms which are not closely related and hence are known to be polyphyletic.
Acacia nilotica was described in 1754, so, because the International Code of Nomenclature stipulates that if a genus is determined to be polyphyletic, e.