Projected phase-space distribution of galaxies in the cluster field, v_rf vs. R. Crosses and dots represent interlopers and cluster members, respectively, identified by the SG algorithm of Fadda et al. (1996). The vertical line is a preliminary estimate of the cluster r₂₀₀ () based on the global estimate of the cluster velocity dispersion (see Sect. 3). Members within are identified with blue (respectively red) dots, if they have a probability ≥0.5 to belong to the KMM-sub (respectively KMM-main) subcluster identified by the KMM algorithm (see text and Fig. 6, McLachlan & Basford 1988; Ashman et al. 1994). The green colored dots indicate those members that are flagged by the DSb procedure (described in Appendix A) as possible members of substructures. The green curves represent the Caustics identified by the Caustic technique of Diaferio & Geller (1997) (see Sect. 5.2).