htl80/Df(3R)sr16 and homozygous embryos lack the dorsal vessel. Dorsal oblique muscles are reduced to 26%, ventral longitudinal and oblique muscles are reduced to 54% and pleural and dorsal transverse muscles are reduced to 86% of the number present in wild-type embryos. Dorsal muscle 1 is missing. Unfused myoblasts are visible. The visceral muscles are severely defective. The cuticle appears normal.
Df(3R)sr16/htl80 is rescued by htlE12
The lethality of htl80/Df(3R)sr16 flies is rescued by htlE12.