Luminosity and mass – TF relation of the XMP galaxies. The color code parametrizes the morphology as follows: red = symmetric, black = cometary, blue = two-knot, green = multi-knot and grey = no morphological information. Top: the figure contains the luminosity – TF relation found for early-type (cyan line; de Rijcke et al. 2007) and late-type (magenta line; de Rijcke et al. 2007) dwarf and giant galaxies and 1σ errors (cyan and magenta dashed line, respectively; de Rijcke et al. 2007). We note that the 1σ lower limit for the late-type dwarf and giant luminosity – TF relation (magenta dashed line; de Rijcke et al. 2007) falls almost on top of the early-type dwarf and giant luminosity – TF relation (cyan line; de Rijcke et al. 2007). Bottom: the symbol code is □= M_baryon, •= M_H   i and ×  = M_⋆. The magenta and cyan lines show the mass – TF correlation for a sample of dwarf and giant early- and late-type galaxies (de Rijcke et al. 2007), in terms of stellar mass and H i gas plus stellar mass, respectively, and their 1σ errors (magenta and cyan dashed line, respectively; de Rijcke et al. 2007).