Cladogram illustrating the phylogenetic relationships for the major subclasses of mammals and some of the orders within each subclass, with illustrations indicating some cortical fields that are shared across different mammals. Primary visual cortex, dark blue; Secondary visual cortex, light blue; Posterior parietal cortex, green; presumptive posterior parietal cortex, light green; Auditory cortex, yellow; Primary somatosensory cortex, red; Second somatosensory area, pink. Adapted from (Cooke et al., 2014), with permission.