Positions of the fLSBs with photo-z < 0.2. Black, cyan and red points correspond to fLSBs within  ± 1σ of the red sequence, below, and above this interval respectively. The black line indicates the direction of the very large scale filament of galaxies found by Boué et al. (2008) – see their Fig. 10. The contours correspond to the X-ray emission from the XMM-Newton EPIC MOS1 image (Laganá et al. 2008).