title: 1,2,3 = 2,3,4: accommodating the cladogram.
authors.affiliation: Department of Biology, University of North Carolina, Chapel Hill, NC 27599-3280, USA. feduccia@bio.unc.edu
authors.forename: A
authors.initials: A
authors.lastname: Feduccia
mesh_terms: D000818:Animals; D005075:Biological Evolution; D001717:Birds / Q000033:anatomy & histology / Q000502:physiology; D005426:Flight, Animal