Redshift evolution of the characteristic stellar mass (top) and the characteristic density (bottom) of the GSMF of dwarf irregular galaxies. Black circles are the observed values by Huertas-Company et al. (2016, z > 0.06) and Moffett et al. (2016, z ∼ 0.06). The red lines and shaded areas show the best fit and the corresponding uncertainties, while the dotted black lines indicate the evolution of the GSMF previously present in SPRITZ.