I think coelacanths are the most well known example (maybe just became they're so alien looking compared to their other extant relatives and were thought to hav

I think coelacanths are the most well known example (maybe just became they're so alien looking compared to their other extant relatives and were thought to have gone extinct so long ago, especially compared to some species that were thought to have gone extinct more recently) Edit: there's a fun list here https://en.m.wikipedia.org/wiki/Lazarus_taxon https://en.m.wikipedia.org/wiki/Lazarus_taxon