Sky distribution of the galaxies belonging to the low-z (left) and high-z (right) composite group. RA-Dec positions are expressed in terms of the rescaled distances ℛ. Points are colored according to the (U − B) colors of the galaxies, while point dimensions are scaled according to the masses of the galaxies. As a reference we draw dashed circles corresponding to the different central/intermediate/external region limits in each composite group.