part of develops from ellipsoid body A doughnut shaped synaptic neuropil domain of the central complex of the adult brain that lies just anterior to the fan-shaped body. Its hole (the ellipsoid body canal) points anteriorly and has an axon tract (the anterior bundle) running through it. It is divided into concentric layers and into 16 radial segments, 8 per hemisphere, numbered 1-8 from superior medial to inferior medial (Ito et al., 2014). https://cdn.ncbi.nlm.nih.gov/pmc/blobs/acda/10213501/ccb19d89b056/iyad064f6.jpg FBbt:00003678 eb VFB:FBbt_00003678 fly_anatomy.ontology EB https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f073/4407839/e48065582b72/cne0523-0997-f1.jpg synaptic neuropil domain central body ellipsoid body primordium