ellipsoid body inner central domain ellipsoid body anterior ring Concentric subdivision of the ellipsoid body that lies anteriorly in the inner part of the ellipsoid body (Renn et al., 1999; Lin et al., 2013; Omoto et al., 2018). It contains the arborizations of R3a, R3d and R3m ring neurons (Omoto et al., 2018). The 'anterior ring' of Hanesch et al. (1989) and 'anterior disk' of Renn et al. (1999) appear to refer to EBa, EBic and EBoc, collectively. The 'medial shell' of Wolff et al. (2015) refers to EBic and EBoc (Omoto et al., 2018). Lin et al. (2013) included R2 neuron arborizations in this (EBA) domain, but Renn et al. (1999) and Omoto et al. (2018) assign them to the outer domain (EBoc). EBA EBic ellipsoid body anterior disk EBr3 FBbt:00007553 fly_anatomy.ontology ellipsoid body medial shell VFB:FBbt_00007553 ellipsoid body layer