Figure 3.

(a–c) Latitudinal gradients in minimum (solid grey lines) and maximum temperature (solid black lines) averaged across 1° longitudinal cells (and in precipitation in the New World, dashed lines). (d–f) Latitudinal gradients in median species (black) and genus (grey) latitudinal range size. Dashed lines represent 25th and 75th percentiles of the underlying range-size frequency distributions. (g–i) Latitudinal gradients in mean per-genus species richness (black) and species richness (grey).