Arthropods evolved from a common lineage with annelids and mollusks and therefore share some fundamental organizational features of their nervous systems. The most primitive examples of this lineage consist of a bilaterally symmetrical nervous system of one ganglia per body segment, each of which is composed of paired hemi-ganglia, one on each side of the body.
Actually it is related to the cockroach....but I still like em...
Don't ralph, but the similarity has made me ponder more than once if cockroaches might be good!