Species richness grid maps of extant North American mammals in this study. (A) Chiroptera; (B) Didelphimorphia; (C) Xenarthra; (D) Primates; (E) Rodentia; (F) Carnivora; (G) Lagomorpha; (H) Eulipotyphla; (I) Artiodactyla. See Supplementary Data SD8 for Perissodactyla species richness grid map. Maps are in the Eckert IV equal-area projection. Silhouettes were obtained from PhyloPic (CC0 1.0 licenses).