has soma location develops from capable of expresses sends synaptic output to region Rh6 sensory organ cell eyelet eyelet photoreceptor cell H-B eyelet photoreceptor HBeyelet FBbt:00005740 VFB:FBbt_00005740 Evidence that this is a cholinergic sensory neuron comes from staining for choline acetyltransferase expression. (Yasuyama and Meinertzhagen, 1999). fly_anatomy.ontology Cholinergic, rhabdomeric photoreceptor cell of the eyelet (Yasuyama and Meinertzhagen, 1999). It expresses Rh6 and is green light-sensitive (Jean-Guillaume and Kumar, 2022). It develops from an Rh5 photoreceptor of the larval Bolwig organ, which changes its Rhodopsin expression during pupal development (Jean-Guillaume and Kumar, 2022). Its functions in the entrainment of the circadian clock (Helfrich-Forster et al., 2002). Its axon terminates in the accessory medulla (Helfrich-Forster et al., 2007). There are four of these cells per eyelet (Jean-Guillaume and Kumar, 2022). HBeyelet rhabdomeric photoreceptor cell accessory medulla accessory medulla neuron adult cholinergic neuron adult sensory neuron adult PNS neuron Rh5 photoreceptor of Bolwig organ entrainment of circadian clock by photoperiod