Molecular and morphological analysis of the developing nemertean brain indicates convergent evolution of complex brains in Spiralia
Abstract Background crash bars The brain anatomy in the clade Spiralia can vary from simple, commissural brains (e.g., gastrotrichs, rotifers) to rather complex, partitioned structures (e.g., in cephalopods and annelids).How often and in which lineages complex brains evolved still remains unclear.Nemerteans are a clade of worm-like spiralians, whic