Exd2^EY03872 mutant embryos and pupae are smaller than controls but morphologically normal otherwise, the pupariation time is longer relative to wild-type. Both male and female mutant flies show significantly extended lifespan but the effect is more pronounced in females. The fecundity (number of eggs laid) of Exd2^EY03872 females declines more rapidly with age than in controls as does the number of germline stem cells in mutant germaria; the mitochondrial network in these germaria is disorganized.