- Nov 19, 2002
Steve O'Shea said:...Actually, there's an interesting thought; anyone know how 'old' flounder are (in the old fossil record)?
Er, just run a search. The flounder group (Pleuronectiformes) are a quite recent group, the earliest examples date from the middle Miocene in the late Tertiary. Octos have been knocking around since the late Jurassic, and possibly earlier. Flatfish rays are known from the earlier Eocene period at least 36 mya, though ray finned fish can be traced as far back as 200mya. I've no idea how closely these Miocene rays were related to the modern flounder.