Stellar age (mass-weighted) versus V/σ, the ratio of the stellar radial velocity and velocity dispersion, for each spaxel of NGC 3115 MUSE cube. The spaxels corresponding to the fast-rotating disc (|V/σ| > 1) have younger stellar ages (9–13 Gyr) whereas the pressure supported regions of NGC 3115 (|V/σ| < 1) show a rather uniform and old stellar age distribution (≥13 Gyr). The younger stellar population observed in Fig. 5 is therefore well associated to the fast-rotating disc observed in Fig. 3. To help reading the figure, we indicate the age of 13 Gyr by an horizontal dashed line, and plot the mean and standard deviation of the points distribution in ten bins of V/σ.