The life span of a species can mean at least two things. The lifespan of individuals that belong to the species or how long the entire species can survive witho

The life span of a species can mean at least two things. The lifespan of individuals that belong to the species or how long the entire species can survive without mutating. I believe extinction, species lifespan and the theory of recapitulation (ontogeny recapitulates phylogeny) are intertwined https://en.wikipedia.org/wiki/Recapitulation_theory https://en.wikipedia.org/wiki/Recapitulation_theory