domeG0468 mutants exhibit abnormal spiracles due to a lack of cell elongation.
Mutant animals are lethal at the first instar larval stage and show a phenotype in the gastrointestinal tract indicate by a block of food passage at the defective proventriculus organ. A failure of ectodermal cells to invaginate and a disorganised endodermal layer of the proventriculus is seen.
Lethality occurs during the first larval instar.
The shape of the posterior spiracles is abnormal in mutants; the stigmatophore does not protrude and only the most external part of the filzkorper is formed.