«The octopus nervous system is organized in a totally different way from ours: The central brain surrounds the esophagus, which is typical of invertebrates, but it also has groups of neurons in the arms that can work relatively autonomously, plus huge optic lobes involved in vision,» said Daniel Rokhsar, who co-led the project along with Clifton Ragsdale, of the University of Chicago. (sciencedaily.com)
In 2012, Nicholas Strausfeld of the University of Arizona and colleagues described the preservation of the brain and optic lobes of a fossilized arthropod, about four centimeters long with a many - segmented, shell - covered body. (the-scientist.com)
Scale bar is 2.5 cm and letters indicate parts of the brain: ce, cerebellum; el, endosseus labyrinth; fl, floccular lobe; ol, optic lobe; os, occipital sinus impression; pb, pituitary bulb; t, telencephalon; w, wulst. (sciencedaily.com)