polyphyletic
adjective
poly·phy·let·ic
ˌpä-lē-(ˌ)fī-ˈle-tik
: of, relating to, or derived from more than one ancestral stock
specifically
: relating to or being a taxonomic group that includes members (such as genera or species) from different ancestral lineages
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Merriam-Webster unabridged
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