tal^pri-1/tal^pri-2 embryos show a number of cuticle phenotypes; they completely lack denticle belts and dorsal hairs, and the head skeleton and posterior spiracles are deformed. The mutant embryos lack the specific F-actin accumulation that is normally seen at the site of denticle formation, but the F-actin signal at the cell boundaries remains in the presumptive denticle cells.

tal^pri-1/tal^pri-3 embryos show defects in the dorsal branches and transverse connectives of the tracheal system, including a loss of tracheal network integrity and an irregular tube diameter. The dorsal trunk lacks characteristic F-actin structures in the mutant embryos compared to wild type and the F-actin is disorganised

tal^pri-1/tal^pri-2 embryos lack the taenidial folds in the tracheal system.