Distribution of bright disc galaxies (grey region) and dS0 (red dots and green squares) in the r_b,e/h–n plane. The grey region represents the locus of 95% of the bright disc galaxies in this plane. The solid line shows the median of the distribution of the bright disc galaxies. The upper right corner of the r_b,e/h–n relation for bright disc galaxies is mainly made by bulge-dominated systems. In contrast, disc dominated systems are mainly located in the lower left corner of the relation. The black stars represent fast rotators according to the classification given by Toloba et al. (2014).