Reconstructed H I Mass Function based on the combined optically corrected Nançay and Arecibo distributions (data points and the Schechter function fit to them, in black), and contributions to the HIMF for individual luminosity bins, indicated by different colors (see the Legend). Volume densities are shown in each 0.5 dex wide bin in H I mass, log(Φ(M)ΔM), in units of Mpc⁻³ dex⁻¹. We recreated a plot similar to Fig. 7 with artificial, extrapolated H I mass distributions for luminosity bins below log(L_r/L_⊙) = 7.75 shown in gray. For viewing clarity we omit points with uncertainties larger than the density values and do not show the uncertainty regions on each luminosity bin. Uncertainties for the corrected bins are given in Table 2.