More severe Asx phenotype than Asx- deletion and also a more severe transformation of thoracic segments towards abdominal segments. Segmentation defects are also present: missing segments, midline denticles missing and hemisegments. Heterozygous adults have a mild transformation of A4 to A5 in males.
Double heterozygotes with sxc3 show reduced viability and survivors show transformations typical of Pc-G mutants including transformation of A4 to A5. Most also show haltere to wing transformations typical of trx-G mutants. No similar interaction with sxc5 or Df(2R)M41A4 is seen, though anterior transformations of A5 to A4 do occur with Df(2R)M41A4, similar to those seen in trx-G group mutants.