Histogram of the Sérsic indices in the r-band – our filter with the best seeing (≤0.7 arcsec). The solid histogram corresponds to MUGs with M_⋆ > 8 × 10¹⁰ M_⊙ (note that only 20 objects appear as the other 2 have non-valid analyses in the r-band) while the dashed ones are for 6 × 10¹⁰ < M_⋆/M_⊙ < 8 × 10¹⁰ galaxies. This histogram reveals that the majority of the objects are disk-like (n < 2.5), in accordance to the “swollen disk” morphology found in relic galaxies and in general for MUGs at low- and high-z.