Heterozygous males and females have shorter, wider, blunter wings than normal and venation is irregularly thickened and branched in a few places. In some cases there is a break in the posterior crossvein. The bristles are somewhat shortened, especially the humerals, notopleurals and pretarsals. Hairs on the thorax have a straggly arrangement. The phenotype is more extreme in females than males, and at temperatures above 25^oC. The majority of females are completely sterile, while those that are fertile produce a reduced number of progeny. Viability of heterozygotes is erratic, from practically normal to half-normal. Emergence is delayed somewhat by slow development.

Lethal over Tp(2;3)dp. RK2A.