overlaps capable of part of expresses sends synaptic output to region Rh2 ocellar retinula cell VFB:FBbt_00004242 ocellus retinula cell ocellus photoreceptor ocellar photoreceptor cell Photoreceptor cell of an adult ocellus. It expresses the violet-sensitive Rh2 (Jean-Guillaume and Kumar, 2022). Its axons are found proximal to its nucleus, and they target their corresponding ocellar ganglion (Caldwell et al., 2007). The lateral ocelli each have around 100 photoreceptor cells, whereas the medial one has around 75 (Dorkenwald et al., 2024). Some of these cells directly target the lobula or lobula plate (Jean-Guillaume and Kumar, 2022). These cells aid flight stabilization and augment the phototactic response (Jean-Guillaume and Kumar, 2022). They form simpler circuits with fewer connections before reaching the central brain, resulting in faster transmission of information (Jean-Guillaume and Kumar, 2022). FBbt:00004242 fly_anatomy.ontology ocellus sensory organ cell rhabdomeric photoreceptor cell ocellar ganglion adult sensory neuron phototaxis