Comparison of the density of CLASSIX galaxy clusters in a slice of 50 Mpc width around the Supergalactic plane (red, filled data points) to the region outside (blue, open data points). Only the volume and the data outside the ZoA are considered. The densities were determined in concentric shells with a radial width of 25 Mpc. The cluster densities were multiplied with a correction factor to account for survey sensitivity variations. The mean density in the survey volume out to 400 Mpc is indicated as a dotted line.