Sérsic n − M relation in the r-band for our new dwarf candidates (black squares), the known dwarfs in the survey region (gray filled squares), Virgo dEs (plus signs, Binggeli & Jerjen 1998), LG dwarfs (open circles, Jerjen et al. 2000a), and M 81 dwarfs (open triangles, Chiboucas et al. 2009). The vertical error bars shown for our dwarf candidates and previously known M 83 subgroup members are taken from Table 2. Horizontal error bars are a global ±0.5 mag for their absolute magnitudes.