Measurements in ImageJ/Fiji. A Measurements of cell width (line a), height (line b) and nucleus diameter (line c) B Measurements of cuticle and basal lamina thickness. Cuticle and basal lamina thickness (yellow lines) were measured at intersections of grid lines (blue grid) with cuticle/basal lamina surface C Measurements of membrane labyrinths depth. Membrane labyrinth depths (yellow lines) were measured at intersections of grid lines (blue grid) with the outline of membrane labyrinth edge (red line) D Measurements of spatial density of membrane infoldings. The length of apical/basal surface outline (red line) was measured and the infoldings along the outline (yellow points) were counted.