Consider the changing morphospace within the stem group of a phylum when it is traced back through successively earlier nodes from the ancestor of the crown group (the crown ancestor) to its last common ancestor with a sister phylum. The crown synapomorphies are lost immediately. Some stem-group branches may be quite diverse, and their derived [...]
Filed under: Australopithecus, Homo gautengensis, Paleoanthropology | Tagged: Australopithecines, Homo gautengensis | Comments Off
