Expression of MAGEScer\UAS.cNa in pupal mushroom bodies under the control of Scer\GAL4ey-OK107 induces abnormal pupal mushroom body morphology with reduced density of neuronal stomata. MAGEScer\UAS.cNa over-expression does not suppress neural precursor proliferation during mushroom body neurogenesis but impairs neuronal differentiation, resulting in less differentiated neurons in post-embryonic neurogenesis.