Definition of polyphyletic in English:

polyphyletic

Syllabification: pol·y·phy·let·ic
Pronunciation: /ˌpälifīˈletik
 
/

adjective

Biology
(Of a group of organisms) derived from more than one common evolutionary ancestor or ancestral group and therefore not suitable for placing in the same taxon.
More example sentences
  • The present study, as well as previous molecular studies, suggest that the oegopsid squids represent a polyphyletic group with uncertain phylogenetic affinities.
  • Loriciferans were originally assigned to the paraphyletic or polyphyletic group called Aschelminthes.
  • The taxonomy of the group is not well resolved, with many family-group taxa considered paraphyletic or polyphyletic, and several subfamilies are unplaced at the family level.

Definition of polyphyletic in:

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