Malpighian tubule elongation is incomplete in homozygous embryos.
Tracheal dorsal trunks fail to form in the embryo, due to failure in migration of trachea cells. Embryonic muscles 4, 11, 19 and 20 are absent and muscles 15, 16 and 17 are small and displaced (though note that the ventral epidermis is affected in pnt mutants). Commissures in the CNS are fused.
CNS and tracheal phenotype.
embryonic lethal. Zygotic expression in embryo. Head skeleton of embryo pointed; median part of all denticle bands deleted. CNS broad and less dense than wild type. Sensory organs (maxillary, antennal and Keilin's organs) spread.