VAGILITY AND SURVIVAL

Lower extinction rates among mollusks with planktonic (wide ranging) larvae. Nonplanktotrophic mollusks have higher extinction rates and do not range as far from the parent.

(after) Jablonski, D. 1982. Evolutionary rates and modes in Late Cretaeous gastropods: Role of larval ecology. IN Mamet, B., and Copeland, M.J. (eds.) Proceedings of the 3rd North American Paleontological Convention, Toronto.