part of fasciculates with develops from capable of expresses sends synaptic output throughout has sensory dendrite in Or42a sensory epithelial cell adult antennal lobe commissure adult antennal olfactory receptor neuron maxillary palp olfactory receptor neuron sNPF neuron antennal olfactory receptor neuron precursor Nab adult antennal lobe receptor neuron bilateral antennal lobe receptor neuron adult neurosecretory neuron adult peptidergic neuron maxillary palp basiconic sensillum pb1 adult olfactory receptor neuron Or42a odorant receptor neuron VM7 adult odorant receptor neuron Or42a fly_anatomy.ontology Adult olfactory receptor neuron (ORN) that expresses Or42a (Benton et al., 2025). Its dendrite transduces signals from maxillary palp basiconic sensillum pb1 (Couto et al., 2005; Endo et al., 2007). It responds to esters and ketones (Benton et al., 2025). Its axon innervates antennal lobe glomerulus VM7 dorsal compartment, bilaterally (Benton et al., 2025). It expresses sNPF (Carlsson et al., 2010). It develops from an Nab precursor (Benton et al., 2025). There are approximately 15 of these cells on each side (Grabe et al., 2016; Benton et al., 2025). FBbt:00067042 ORN_VM7d adult ORN pb1A DoOR:Or42a FlyBrain_NDB:10400 VFB:FBbt_00067042 ORN_VM7d adult ORN Or42a adult ORN (Or42a) antennal lobe glomerulus VM7d sensory perception detection of molecule of fungal origin