The ontogenesis of any given living organism is a short, condensed recapitulation of its ancestral history or of its phylogenesis.
A similar connection determines the relation between ontogenesis and phylogenesis.
We have concentrated the full force of our discussion upon an example drawn from phylogenesis.
phylogenesis phy·lo·gen·e·sis (fī'lō-jěn'ĭ-sĭs)
phylogeny phy·log·e·ny (fī-lŏj'ə-nē)
The evolutionary development and history of a species or higher taxonomic grouping of organisms. Also called phylogenesis.
The evolutionary development of an organ or other part of an organism.