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. Author manuscript; available in PMC: 2018 Jun 13.
Published in final edited form as: Nature. 2017 Dec 13;553(7686):45–50. doi: 10.1038/nature25030

Figure 1. CNS evolution and dorsoventral patterning.

Figure 1

(a) A nerve net is ancestral for Cnidaria and Bilateria. The neuroanatomical diversity hampers the reconstruction of the CNS evolution in Bilateria. (b) A central argument for an ancestral medially condensed VNC for Bilateria is the similar deployment of DV-TFs in vertebrates, Drosophila, and the P. dumerilii larva. The staggered expression of these genes concurs with specific neuronal populations.