Spatial distribution of early-type (left) and late-type (right) galaxies in the A2199 supercluster overlaid on the green and white total galaxy number density maps. Contours with sky-blue color indicate the X-ray intensity map taken from the ROSAT All-Sky Survey, smoothed with a Gaussian filter of σ = 15 arcmin. Galaxies with and without WISE 22 μm detections are denoted by red, filled and black, open symbols, respectively. Dashed circles in (a) represent r ₂₀₀ of galaxy groups in the A2199 supercluster (Rines et al. 2001, 2002). North is up, and east is to the left.