Pharate pupae and the few eclosing adults show a short leg phenotype. Leg length = 60-70% wild type. All joints are present, but frequently necrotic. Mutants have severely ataxic legs and are generally unable to stand, though newly eclosed adults can thrash their legs vigorously when supine. Heterozygotes with AP-2¹⁰ have normal or nearly normal legs and moderate incidences of necrotic joints and ectopic cuticular elements with sensory structures that invade medioventral eye territory.