Structure of RXC J1206. The different symbols show the KMM partitions (the black dots are for the main body of the cluster). The orange contours trace the surface density of the red-sequence galaxies; they start at 5σ above the mean background density. The dashed circle has a radius R₂₀₀. The light-grey ellipses trace the additional substructures not detected by the DS test; the galaxies inside them were also excluded for the updated dynamical analysis (see Sect. 5.5).