phylogenetically the same gradual development can be traced in the vertebrate series.
The former are phylogenetically and ontogenetically older than the latter.
It disappears most rapidly after the beginning of absolute disuse both ontogenetically and phylogenetically.
phylogenetically it is a very old structure, for evidences of its existence are found in the fossil remains of some Elasmobranchs.
phylogenetically, then, we see this morbid "sense of injury" to be reversional.
He assumes that muscles with parallel fibers are more primitive, phylogenetically, than are those with fibers arranged pinnately.
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.