FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
chordotonal organ precursor cell & ventral thoracic disc
The stalk and mature sensory organ precursors of the femoral chordotonal sense organ are missing in leg discs of atounspecified larvae.