Although the species is one of the fundamental units of biological classification, there is remarkably little consensus among biologists about what defines a sp

A collection of case studies that seeks to reexamine the understanding of the speciation patterns that appear in the fossil record through an analysis of the pa

In this fascinating exploration of the fossil record, Niles Eldredge overturns the traditional view of evolution as a slow and inevitable process, and he shows

The literature of paleobiology is brimming with qualifiers and cautions about using species in the fossil record, or equating such species with those recognized

Patterns of evolution, as illustrated by the fossil record