title: What is punctuated equilibrium? What is macroevolution? A response to Pennell et al.
authors.affiliation: Department of Ecology and Evolutionary Biology and Biodiversity Institute, University of Kansas, Lawrence, KS, USA. Electronic address: blieber@ku.edu.
authors.forename: Bruce S
authors.initials: BS
authors.lastname: Lieberman
authors.affiliation: Division of Paleontology, American Museum of Natural History, New York, NY, USA.
authors.forename: Niles
authors.initials: N
authors.lastname: Eldredge
mesh_terms: D005075:Biological Evolution; D049810:Genetic Speciation; D008957:Models, Genetic