title: Deep divisions in the Tree of Life--what does the fossil record reveal?
authors.affiliation: IGPP Center for the Study of Evolution and the Origin of Life, Department of Earth and Space Sciences, and Molecular Biology Institute, University of California, Los Angeles 90095-1567, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Schopf
mesh_terms: D000595:Amino Acid Sequence; D001105:Archaea; D001419:Bacteria; D005075:Biological Evolution; D000458:Cyanobacteria; D019143:Evolution, Molecular; D005580:Fossils; D011387:Prokaryotic Cells