Sky distribution of the CLASSIX galaxy clusters in the redshift range z = 0 − 0.025. The clusters associated with the Perseus-Pisces SC are shown as blue solid circles (z ≤ 0.025) and blue solid squares (z > 0.025) and those belonging to the SGW as red solid diamonds. Top: map in equatorial coordinates. The members of the core part of the Perseus-Pisces SC are shown with open circles around the circles and squares. The Galactic band (b_II = ±20°) is shown by the blue dotted 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 (SGB = ±20°) by the red lines. Bottom: map in Galactic coordinates. The larger blue open circles show the members of the Perseus-Pisces SC found with an increased lower luminosity limit of 10⁴³ erg s⁻¹ as explained in Sect. 4.3. The two green points show the two clusters A 569 (positive b_II) and A 2634 (negative b_II), which are part of the discussion in Sect. 5.