Figure 2From: Breaking evolutionary and pleiotropic constraints in mammals: On sloths, manatees and homeotic mutationsSchedule to show the predictions for vertebebrae shape and the presence or absence of ribs of the Homeosis hypothesis and Primaxial/abaxial hypothesis for sloths ( Choloepus, Bradypus ) and manatees ( Trichechus ). The sternal rib parts are indicated by darker coloration. Note that the sternal rib parts are usuall small in the first and second ribs of mammals.Back to article page