lethal | recessive
visible | dominant
wing
wing vein L1
wing vein L3
wing vein L5
Heterozygotes have a 'scalloped' wing margin. There are gaps in the distal costa and immediately distal to it in the triple row, in the double row at the distal tip of vein 3 and in the margin hairs proximal to vein 5. Veins 3 and 5 are thickened.