part of expresses sends synaptic output to region sends synaptic output to cell Rh3 medulla layer M6 dorsal margin photoreceptor cell dorsal margin photoreceptor cell R8 VFB:FBbt_00004209 R8-DRA fly_anatomy.ontology R8-DRA R8 photoreceptor of the dorsal rim area of the retina. It expresses the UV-detecting Rhodopsin 3 and extends to medulla layer M6, where it synapses to Dm-DRA2 (Sancer et al., 2019). In expression and morphology it is more similar to R7 cells than other R8 cells (Sancer et al., 2019). FBbt:00004209 DRA R8 photoreceptor cell R8 medulla dorsal rim area distal medullary amacrine neuron Dm-DRA2 dorsal margin ommatidium