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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 ?
is currently recognized as a highly polyphyletic genus and many attempts of new circumscription of smaller genera are in progress (e.
The taxonomy of the group has been problematic and several studies suggested that Myrmotherula is polyphyletic (Belmonte-Lopes et al.
These species group members emerged as polyphyletic in maximum likelihood phylograms based on morphological characters and concatenated analyses of cytochrome oxidase I and arginine kinase genes (Hansen et al.
These data also reveal that Chilatherina and Glossolepis of northern New Guinea as presently understood are polyphyletic and most likely should be integrated into the genus Melanotaenia, which is the oldest name for the group.
2008), however, and other genetic analyses suggest polyphyletic origins for emmer (Allaby et al.
Oral samples from each outbreak are polyphyletic with respect to strains from their immediate environment, a finding consistent with multiple contamination events or multiclonal infection sources.
Clonal diversity and polyphyletic origins of hybrid and spontaneous parthenogenetic Campeloma (Gastropoda: Viviparidae) from the southeastern United States.
As already noted by Benson (1938), both subfamilies as presently constituted are probably polyphyletic.
The resulting phylogeny confirmed many of the species groups from earlier studies, but more importantly showed that Aquarius was polyphyletic since A.
Recent molecular studies recognized two subtribes of Gentianeae: Swertiinae and Gentianinae (2, 3, 5) and within Swertiinae, Swertia is highly polyphyletic (2, 3, 4, 5, 6,7).