The regeneration of lost parts involves both epimorphosis and morphallaxis. The conclusion is that planarian regeneration cannot be listed neither to Epimorphosis or Morphallaxis. One of them is Epimorphosis, which appears in Salamander limbs. Along with epimorphosis, some polychaetes like "Sabella pavonina" experience morphallactic regeneration. In vertebrates, epimorphosis relies on blastema formation to proliferate cells into the new tissue.