FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
Embryos derived from exuunspecified mutant females have anterior structures replaced by posterior midgut and proctodeum.
exuunspecified has male sterile phenotype, suppressible by exu::Dpse\exu1594
exuunspecified has embryo | anterior phenotype, enhanceable by bcdunspecified
exuunspecified, vasunspecified has embryo phenotype
The phenotype of embryos derived from exuunspecified mutant females is enhanced by bcdunspecified. exuunspecified vasunspecified double mutants produce dicephalic embryos.