Figure 5. Histograms of species longevities. Horizontal scales (longevity in m.y.) are the same for all plots, vertical scales are the same for data for one author. A - Lazarus, complete ranges only. B - Lazarus, with truncated ranges. C - Abelmann, complete ranges only. D - Abelmann, with truncated ranges. E - Caulet, including truncated range tops and extended range bases determined from Lazarus' data. F - Lazarus, species originating after 13 Ma (includes truncated ranges). G - Lazarus, species originating before 13 Ma (includes truncated ranges).