Real space (upper row) and phase space (lower row) distributions of a dwarf forming on the elliptical merger orbit C45 for three different snapshots in its evolution with 1 Gyr time steps between consecutive panels, as indicated above the columns. The stellar content of the dwarf, identified at the moment of the middle panel, is traced in red. The integrated surface density of the gas is visualized in blue, while stars not belonging to the dwarf are plotted in yellow and gray in real and phase space, respectively.