to resurface
to reappear
Link to present incidents:
Frog species re-evolved "lost" bottom teeth after more than 200 million years, according to new research.Tree-dwelling Gastrotheca guentheri are the only frogs with teeth on both their upper and lower jaw. The reappearance of these lower teeth after such a long time fuels debate about whether complex traits are lost in evolution or if they can resurface.