Mutant develop additional vein segments in the marginal, submarginal, 2nd and 3rd posterior wing cells. Up to 10% of the flies have an additional vein segment in the 1st posterior cell.

net^Ch86/Df(2L)net62 flies show a strong disturbance of the wing vein pattern; a net of veins and additional wing vein segments develop in the wing, including in the 1st posterior cell.

Homozygous animals exhibit some disryptions of the wing veins. Up to 10% of mutants carry and extra vein in the distal part of the first posterior cells. 20-30% of heterozygous animals develop small extra veins in the second and third posterior cells. In net^Ch86/net^2-45 heterozygotes, some wing veins exhibit wing vein disruptions. Up to 7% of mutants carry an extra vein in te distal part of the first posterior wing cell. net^Ch86/Df(2L)net62 animals develop severe vein disruptions in the form of nets and segments of veins including the extra vein in the first posterior sector.