Distribution of the CLASSIX clusters in the redshift shell z = 0.03–0.06 (solid and open circles). The member clusters of the five superstructures are marked in colour, Quipu (red), Shapley (blue), Serpens-Corona Borealis (green), Hercules (purple) and Sculptor-Pegasus (beige). The members of the superstructures outside the target redshift range are not encircled by a black ring. The clusters outside superclusters are shown as grey circles, with open circles in the region of the Zone of Avoidance. The small brown dots show the distribution of 2MASS galaxies in the same redshift region. The dotted blue lines show the Zone of Avoidance region (|b_II|< 20°) and the solid blue lines encloses the region with an interstellar hydrogen column density n_H > 2.5 × 10²¹ cm⁻².