Same as in Fig. 3 for groups of different richness in superclusters of filament and spider morphology (red and blue lines). Solid lines show distributions for groups with at least 12 member galaxies. Dashed lines correspond to distributions for groups with 4 ≤ N_gal ≤ 11. Dotted lines to single galaxies and groups with N_gal ≤ 3.