DYNAMIC INTERACTION. “That the vestigial remnants of true evolutionary changes provide key evidence for evolutionary changes cannot be denied, nor can the dynamic relation between phylogeny and ontogeny. In the famous words of Leigh Van Valen, “Evolution is the control of development by ecology” (except in clades where there is no clear developmental sequence).”
https://evolution-outreach.springeropen.com/articles/10.1186/s12052-014-0012-5