Definitions for "Phylogeny"
The history of genealogical development; the race history of an animal or vegetable type; the historic exolution of the phylon or tribe, in distinction from ontogeny, or the development of the individual organism, and from biogenesis, or life development generally.
Evolutionary history of an organism or group of related organisms ( loc. cit.).
The evolutionary relationships among organisms; the patterns of lineage branching produced by the true evolutionary history of the organisms being considered.
a hypothesis based on the best interpretation of the data at hand and subject to further evaluation (and possibly change) as new data become available
The classification structure used to organize all forms of life, and the relative position on that structure.