ellipsoid body outer central domain ellipsoid body medial shell EBr2r4 VFB:FBbt_00007556 ellipsoid body outer ring EBO EBoc 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) do not seem to include R2 neurons in the outer ring (EBO), but they are included by Renn et al. (1999) and by Omoto et al. (2018), who claim that EBO corresponds to EBoc. ellipsoid body anterior disk ellipsoid body anterior ring Outer concentric subdivision of the ellipsoid body. It contains the arborization of R2, R4d and R4m ring neurons (Renn et al., 1999; Young and Armstrong, 2010; Omoto et al., 2018). FBbt:00007556 fly_anatomy.ontology ellipsoid body layer