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Sampling scheme, range maps, and North American LGM glacial cover. Sampling localities are shown by major cytb lineage. The thick black lines are the current range for each species, with the addition of P. maniculatus (white line) on the Peromyscus map. The light blue in the bottom right image is LGM glacial ice cover. COP: Colorado Plateau; LGM: Last Glacial Maximum; NPC: North Pacific Coast. Color schemes for species and lineages are held constant across figures
