Fig. 15.
Proposed diversification of the CN in vertebrates, visualizing the appearance of new CN subdivisions during evolution alongside increasing behavioral complexity. Note that in several shark species the CN is clearly divided into two parts, but their functional independence in terms of downstream connectivity has not been examined. SPS, substitutions per site in the dendrogram, reflecting relative amount of genetic changes since the previous branch. Dendrogram based on [130] and [422]