part of expresses receives synaptic input in region sends synaptic output to region sends synaptic output to cell Rh4 medulla layer M3 photoreceptor cell R7 distal medullary amacrine neuron Dm8a yellow optic column transmedullary neuron Tm5a yellow ommatidium photoreceptor cell R7 of yellow ommatidium Connectivity with Tm5a inferred from EM reconstructions from a single medulla column (Gao et al., 2008) and selective arborization in yellow columns (Karuppudurai et al., 2014). Connectivity to Dm8 based on EM data (Gao et al., 2008). Connectivity with R8 based on EM data (Takemura et al., 2008; Takemura et al., 2015). yR7 FBbt:02000005 fly_anatomy.ontology yR7 VFB:FBbt_02000005 Photoreceptor cell R7 that is part of a yellow ommatidium and expresses Rhodopsin 4 (Wernet and Desplan, 2004). It outputs to transmedullary neuron Tm5a (Gao et al., 2008; Karuppudurai et al., 2014) and to Dm8 neurons in medulla layer M6 (Gao et al., 2008; Sancer et al., 2019). It receives synaptic input from photoreceptor cell R8 of the same column (Takemura et al., 2008; Takemura et al., 2015), mostly in M3 (Takemura et al., 2008).