Imprecise excision of the progenitor P{SUPor-P}GirdinKG07727 insertion. 996bp of the 5' end of the P{SUPor-P} element remains at the insertion site, within the Girdin 5'UTR.
Homozygous embryos derived from females containing homozygous germline clones show defects in head morphogenesis and loss of anterior structures such as mouth hooks. They contain numerous ectopic granules of cuticle.