Evolutionary scheme we propose for CGs. In the x-axis we have the velocity dispersion of CG, in the opposite direction the crossing time which increases as σ_G decreases, having less dynamically evolved CGs. On the y-axis, we have the fraction of LTGs. Our scheme evolves from stages 1 to 3, where the CGs have a lower fraction of LTGs, higher σ, and lower H_ot_c. Our results show that this evolution is accelerated in non-isolated CGs.