ScerGAL4amos.PZ drives expression in a subset of olfactory sensory organ precursor cells located in the presumptive third antennal segment of the antennal disc starting at 4 hours APF; these precursors go on to become basiconic and trichoid sensilla.
ScerGAL4amos.PZ-expressing neurons arrive at the antennal lobes at 28 hours APF.