has synaptic IO in region receives synaptic input in region sends synaptic output to region medulla layer M8 medulla layer M9 medulla layer M10 transmedullary Y neuron lobula layer 2 lobula layer 3 lobula layer 4 lobula plate layer 1 adult GABAergic neuron lobula layer 5A adult transmedullary Y neuron TmY19b 2025-04-28T12:00:00Z https://github.com/FlyBase/drosophila-anatomy-developmental-ontology/issues/2161 VFB:FBbt_20011498 FBbt:20011498 fly_anatomy.ontology Adult transmedullary Y neuron with its soma lateral to the medulla (Nern et al., 2025; Valentino et al., 2025). It remains in the ipsilateral optic lobe, with the majority of its input and output synapses found in lobula layers 2-5A (Nern et al., 2025; Valentino et al., 2025). It also receives input in medulla layers M8-M10 and has a small arbor in lobula plate layer 1 (Nern et al., 2025; Valentino et al., 2025). It is GABAergic (Nern et al., 2025). There are approximately 20 of these cells per hemisphere (Matsliah et al., 2024; Nern et al., 2025). LMa3 Cell type identified in multiple EM datasets and at light level (Schlegel et al., 2024; Dorkenwald et al., 2024; Matsliah et al., 2024; Nern et al., 2025; Valentino et al., 2025). Nern et al. (2025) TmY19a mapped to Valentino et al. (2025) TmY17 based on manual inspection of morphology, however around double the number of cells are reported in Valentino et al. (2025). TmY19b TmY19b TmY17