Adult females have eight abdominal segments, lack genitalia and (occasionally) analia. Males have eight abdominal segments and retain both genitalia and analia. In these flies parasegment 13 is transformed towards 10 while parasegment 14 is unaffected. Embryos lack posterior spiracles.

Heterozygotes with Abd-B^iab9-tuh-3 exhibit genital defects with relatively high penetrance.

A5-A8 (including female genitalia) transformed to A4 in mosaics. Embryos have sclerotic plates in pA8 and occasional extra denticles in A9, and parasegments 10-13 are transformed to parasegment 9.

Heterozygous males have a 7th tergite, there is loss of pigment in the anterior of the 5th tergite, and the 6th sternite has bristles.