Left: particles of each cold substructure in the phase space, with the same colors as in Fig. 9, superposed on all particles used in this work (light gray). Right: Gaussians with mean = 1425 km s⁻¹, i.e., the NGC 1399 systemic velocity, and standard deviation of 300 km s⁻¹ (blue solid lines) and 374 km s⁻¹ (red solid lines), namely the velocity dispersion of the Fornax cluster and of the Fornax members analyzed by Drinkwater et al. (2001).