Homozygous somatic clones in the legs and wings have bractless mechanosensory bristles.
Egfrf37/Egfrt1 lack wing vein L4. Wing clones of Egfrf37 mutant cells are smaller, narrower amd more elongated than controls and are incapable of differentiating vein histotype except in L1.
In trans to Egfrt1, Egfrf37 shows unexpectedly severe wing vein abnormalities.
Clonal analysis reveals phenotypes in the adult including loss of wing vein, ectopic wing vein, reduced cell size, extra bristles, cell lethality and tergite bristle abnormalities. Phenotype is cell autonomous. rl1/Df(2R)rl10a strongly enhances the wing phenotype of Egfrt1/Egfrf37.
Strong hypomorph. The viability of homozygous clones in the wing is reduced, but higher than the viability of homozygous Egfrf24 or Egfrf11 clones in the wing. Cells in the Egfrf37 clone are 40-50% smaller than normal. A clone present on one wing surface causes the opposite wing surface to blister. Wing veins fail to differentiate where clones cross them, although the sensilla campaniformia of wing vein LIII are not removed by dorsal clones crossing this vein. The failure to differentiate wing vein is cell autonomous. Wild-type cells may differentiate into extra wing vein material abutting the clone border when the border is near the normal course of a vein. Homozygous clones in the notum contain small cells, with densely packed trichomes. Cell density is 40-50% higher than normal. Clones in the leg contain extra chaetae. Clones in the head contain small cells, with extra chaetae. Homozygous clones in the abdominal tergites are viable.