Sky distribution of the superclusters at z ≤ 0.03 in equatorial coordinates (upper panel) and galactic coordinates (lower panel). The superclusters are marked by numbers: 1 = Perseus-Pisces Supercluster, 2 = Abell 400 supercluster, 3 = Local Supercluster, 4 = Centaurus Supercluster, 5 = Coma Supercluster 6 = Hercules supercluster, 7 = Sagittarius Supercluster, 8 = Lacerta Supercluster. The full coloured symbols are CLASSIX supercluster members, with z ≤ 0.03, while more distant members are shown by coloured open symbols. All other CLASSIX clusters at z ≤ 0.03 are shown as black open circles. The galactic band (b_II = ±20°) is shown by blue dotted (dashed) lines, the region with high hydrogen column density (n_H ≥ 2.5 × 10²¹ cm⁻²) is indicated by the solid blue lines, and the supergalactic band (SGZ = ±20°) by red lines.