A new work on the early development of starfish with a discussion on neuronal complexity

Analysis of embryonic development and bipinnaria larval anatomy in the common North Atlantic sea star Asterias rubens using a diverse set of antibodies identified three centers of differing neurochemical signature within the previously described nervous system: the anterior apical organ, oral region, and ciliary bands.  

Comparisons of developmental progression and molecular anatomy across the Echinodermata provided a basis for hypotheses on the shared evolutionary and developmental processes that have shaped this group of animals.

https://doi.org/10.1093/icb/icab103