Su(tor)2-931 is a suppressor of phenotype of tor11D
Heterozygotes with SosSutor-405 display a weak chorion phenotype, dorsal appendages have a broad base, are shorter and sometimes duplicated. Heterozygotes with Su(tor)2-31 display a strong ventralised phenotype, dorsal appendages are reduced and displaced towards the posterior pole. Heterozygotes with EgfrE1 have disorganised ommatidia and irregularly spaced hairs.