FIGURE 14.2 Maps showing four aspects of mammalian diversification and diversity. (a) Mean numbers of species per genus within cells. (b) Proportion of species with shorter terminal branch lengths than the overall median [phylogeny from Bininda-Emonds et al. (2007), with branch lengths corrected and modified as explained in text]. (c) Residuals from a loess regression of cell total evolutionary history against cell species number (phylogeny as above). (d) Variance in log(body mass) (unpublished data), with missing data inferred as the mean of all closest relatives with data.