Shows no defect outside the wing when homozygous, but shows rough eyes and shortened legs when heterozygous with Df(2R)X58-5.
Wings have network of extra veins, especially towards tips and margins; L4 vein bent near tip. Semidominant with some Minutes. Suppressed by S (Bedichek, 1936); suppresses expression of ve (Thompson, 1973). Venation effect caused by inadequate contraction of wing during pupal stage, leaving spaces between epithelial layers (Waddington, 1940). Vein patterns of px flies studied in lines selected for increased or decreased expression (Thompson, 1974).
Bridges, 20th Aug. 1914.