U, V, and W velocities (left to right panels) taken from Montes et al. (2001) for known members of all SKGs studied here. The red curves show the best Gaussian fit of each velocity distribution, as listed in Table 1. The purple vertical lines denote a highly probable kinematic candidate of the Pleiades SKG (P_3D ~ 95% and P_2D ~ 98%) with velocity components (U_⋆, V_⋆, W_⋆) = (12.1, − 21.3, − 6.3) km s^-1.