Radial orders and mode periods of the (ℓ = 1,  m = 1) g modes of a 4 M_⊙ (two left-most panels) and a 9 M_⊙ (two right-most panels) model, both having Z_ini = 0.014, log D₀ = 3, α_ov = 0.2, ζ = −0.5, as a function of the central hydrogen mass fraction with respect to the initial value. A (uniform) rotation frequency equal to 20% of the critical Roche rotation frequency was taken for the computations of the pulsations. Filled dotes correspond to modes only excited in the models with microscopic diffusion (orange), and modes excited in both cases (black). Unfilled dots represent non-excited modes. In the panels with the mode period on the ordinate, the black dots indicate the model without microscopic diffusion. We note that the shifts in the mode periods between models with and without microscopic diffusion is small on the scale of this plot.