Derived from or descended from two separate ancestral lines or evolutionary origins.
From Greek di- (two) + phyletic (relating to a phylum or tribe). Phyletic comes from phylon meaning tribe or race. This term emerged in evolutionary biology to describe organisms with dual evolutionary ancestry.
This concept challenged Darwin's simple family tree idea—some organisms turned out to have two completely different family lines merged together, like discovering your ancestors came from two separate countries that hadn't connected before!
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