Embryos exhibit normal epidermis and resultant secreted cuticle, defects lie in internal tissues. Somatic muscle detach and round up. Gut morphogenesis is defective: anterior midgut does not become a slender tube and only two fat gastric caecae are formed. The ventral nerve cord does not fully condense.
Selected as: F2 against Dp(1;4)80f3c.
Class 0 mutation.