Post-starburst diagnostic diagram (spectral index distributions H_α equivalent width vs. $\frac{{\mathrm{H}}_{{\delta }_A}+{\mathrm{H}}_{{\gamma }_A}}{2}$) for SIG, SIP, SIT, and SIM galaxies with MaNGA data considering the spectra associated to the central spaxel, and their associated error bars. The values for galaxies in each sample are presented with symbols and colours according to the legend. The red solid line and area indicate the PSB region.