obsolete adult ellipsoid body extrinsic ring neuron ExR2 true Extrinsic ring neuron that is part of the dopaminergic PPM3 cluster (Omoto et al., 2018). From its cell body in the posterior cortex, it projects along the medial equatorial fascicle and innervates the bulb and the lateral surface of the lateral accessory lobe, bilaterally, as well as entering the ellipsoid body centripetally, arborizing in the outer center (sparse) and outer posterior (concentrated) domains (Omoto et al., 2018). ExR2 FBbt:00003656 ExR2 was not fully reconstructed by Hanesch et al. (1989), so although it is thought that they are represented by this class, it is possible that the Hanesch et al. (1989) ExR2 neurons are the Omoto et al. (2018) ExR4 neurons (Omoto et al., 2018). PPM3-EB fly_anatomy.ontology EB neuron of the dopaminergic PPM3 cluster