Fig. 7From: Views from Understanding Evolution: Parsimonious Explanations for Punctuated PatternsThree plausible evolutionary scenarios that explain the stratigraphic record shown in Fig. 6. (a) Species 3 diverges from Ancestor 1 in a manner consistent with punctuated equilibria. (b) Species 3 diverges from Ancestor 1 very gradually, but intermediate forms are not fossilized. (c) Species 3 diverges from Ancestor 1 via macromutationBack to article page