In hh3 mutants, midline cells do not differentiate and instead die during late embryogenesis.
Mutant embryos have exclusively row-5-type denticles arranged in a disorganized pattern of ventral midline whorls, with no naked cuticle.
40% length of wild type larvae and exhibit a ventral lawn of denticles associated with the loss of naked cuticle from the ventral surface. No obvious segmentation.
Deletion of naked cuticle and fusion of denticle bands.
Strong phenotype. Mutant embryos show no obvious segmentation, and are 40% the length of wild type; denticles form a lawn arranged in a number of whorls on the ventral surface as a result of loss of naked cuticle.