Figure 3.
Homeobox gene loss in chordates. Homeobox gene loss has been extensive during the evolution of the Olfactores (vertebrates plus tunicates), yet in amphioxus, no homeobox gene loss has occurred since the last common ancestor of the chordates (LCAC). (Blue) ANTP class; (red) PRD class; (green) other classes. Gene losses along the tunicate branch occurred before the last common ancestor of Ciona and Oikopleura. Photo of Goodrich reproduced by permission of Department of Zoology, University of Oxford.
