part of bulb synaptic neuropil subdomain anterior bulb VFB:FBbt_00100365 ABU fly_anatomy.ontology FBbt:00100365 Region of the bulb that lies beneath the mushroom body pedunculus, closer to the somata of the ellipsoid body neurons than the superior and inferior bulb. It is formed by the antero-lateral and inferior extension of the lateral region of the superior bulb.