A gene expression map of the larval Xenopus laevis head reveals developmental changes underlying the evolution of new skeletal elements.
Square T, Jandzik D, Cattell M, Coe A, Doherty J, Medeiros DM. A gene expression map of the larval Xenopus laevis head reveals developmental changes underlying the evolution of new skeletal elements. Dev Biol. 2015 Jan 15; 397(2):293-304.