At 29oC heterozygotes with Su(dx)sp show a recessive wing vein gap phenotype. At 25oC the same combination has intact longitudinal veins but forked or incomplete crossveins.
Suppresses the lethal interaction of dxENU with a notchoid class allele of N. Dominantly suppresses the wing notching phenotype of a notchoid allele of N. Heterozygous combinations of Su(dx)sp, Su(dx)4, Su(dx)56 and Df(2L)Su(dx)-7 weakly enhance the wing vein phenotype of NAx-E2.