Blue circles are east Beringian localities (KL: Klondike region, Yukon Territory, Canada). Red circles are contiguous USA localities (NTC: Natural Trap Cave, Wyoming, USA; GC: Gypsum Cave, Nevada, USA; MHC: Mineral Hill Cave, Nevada, USA; DC: Dry Cave, New Mexico, USA [Barrón-Ortiz et al., 2017; Weinstock et al., 2005]). Orange circles are localities with tentatively assigned Haringtonhippus specimens only (FB: Fairbanks, Alaska, USA; ED: Edmonton, Alberta, Canada, USA; SJC: San Josecito Cave, Nuevo Leon, Mexico; (Barrón-Ortiz et al., 2017; Guthrie, 2003). The green-star-labeled HT is the locality of the francisci holotype, Wharton County, Texas, USA. This figure was drawn using Simplemappr (Shorthouse, 2010).