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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Biology) biology relating to or characterized by descent from more than one ancestral group of animals or plants
[C19: from poly- + phyletic]
ˌpolyphyˈletically adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌpɒl i faɪˈlɛt ɪk)

descended from more than one ancestral line.
pol`y•phy•let′i•cal•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
The small family of elephant shrews or sengis (order Macroscelidea) represents a monophyletic radiation endemic to Africa and which was long placed within the polyphyletic group 'Insectivora' (Rathbun & Rathbun, 2006).
Thus, 3 of these 16 STs did not cluster the isolates properly inasmuch as these STs were polyphyletic. In summary, for the Oxford scheme we demonstrated that some STs form polyphyletic groups because 4 of the 7 loci have signals of recombination (Appendix Table 2), whereas for the Pasteur scheme, we noted a serious lack of resolution for some STs because the loci used only by this scheme have the lowest levels of genetic diversity (Appendix Table 2).
Having made this discovery, the team now wants to understand whether angiosperms are either monophyletic -- which would mean Nanjinganthus represents a stem group giving rise to all later species -- or polyphyletic, whereby Nanjinganthus represents an evolutionary dead end and has little to do with many later species.
Neobisiinae was recovered as polyphyletic in our analysis, due solely to the placement of Parobisium charlotteae outside of an otherwise well-supported clade containing all other members of this subfamily (Fig.
The genus Acacia sensu lato is considered polyphyletic (Pedley, 1986; Maslin et al., 2003; Seigler et al., (2006a) as supported by molecular studies (Miller and Bayer, 2001; Luckow et al., 2003), including a series of subgroups.
Brown rot fungi are polyphyletic [10], and while some characteristics such as early hemicellulose removal are common among brown rot fungi [11, 12], their genomes harbor significant variability [13,14] and brown rot fungi can be found in a wide variety of niches in nature [15].
The insufficiency of data on shell fabric of this polyphyletic order comprising superfamilies of uncertain origin is obvious.
[23] proposed a polyphyletic migration operator to utilize as many as four habitats' features to construct a new solution vector, which can generate new features from more promising areas in the search space.
viridis (Peters, 1852), originally defined just morphologically, were each shown to consist of three mitochondrial lineages in a polyphyletic arrangement (Trujillo et al.