Expression of Cdc42L89.Scer\UAS driven by Scer\GAL4ptc-559.1 results in loss or stunting of epidermal hairs. When Cdc42L89.Scer\UAS is driven by Scer\GAL4Bx-MS1096, occasional multiple (but still stunted) wing hairs are seen. A reduction in wing size, formation of ectopic vein tissue and wing margin phenotypes. A strong bristle loss phenotype is seen in the wing margin which precludes observation of the width of the margin stripe. Small outgrowths in the wing surface are also seen.