Etymology
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phylogeny (n.)

"the branch of biology which attempts to deduce the genesis and evolution of a phylum," 1869, from German Phylogenie, coined 1866 by German biologist Ernst Heinrich Haeckel from Greek phylon "race" (from PIE root *bheue- "to be, exist, grow") + -geneia "origin" (from PIE root *gene- "give birth, beget"). Related: Phylogenic.

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biogeny (n.)
1870, "science or doctrine of biogenesis; history of organic evolution;" see bio- + -geny. As "history of the evolution of organisms, genesis or evolution of matter manifesting life (including ontogeny and phylogeny)," 1879.
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