ISSUE OF INHERITANCE. “Crucial difference, however, is that whereas scars and other traces of injury (e.g., from regenerated limbs) remain a part of that organism, they are not passed along to the next generation, and in that essential sense they do not conform to a fundamental tenet of vestigiality as commonly understood.”
https://evolution-outreach.springeropen.com/articles/10.1186/s12052-014-0012-5