Four of the superstructures shown in declination-redshift diagrams. The distance units are in Megaparsec and the two dotted lines show the redshift distance z = 0.03 and 0.06. Top: Shapley supercluster shown by red dots. Grey points show the non-member clusters in the same redshift range with right ascensions between 190° and 215°. The clusters marked by the three blue dots are linked to the Shapley supercluster for an increased linking length (see text). Middle: Serpens – Corona Borealis, marked in red and Hercules, marked in blue. Grey points show the non-member clusters in the same redshift range with right ascensions between 214.4° and 279°. Bottom: Sculptor-Pegasus superstructure shown by red dots. Grey points show the non-member clusters in the same redshift range with right ascensions between 345.3° and 360° as well as 0° and 30.6°.