Four other species, erethizon dorsatum, thought of primarily as a mammal of coniferous forests, and Ursus arctos, Taxidea taxus, and Odocoileus hemionus, all more or less western taxa, are not so broadly distributed as are other members of this grouping.
"Mammals of Northwestern South Dakota"
Kenneth W. Andersen
Wide-spread species that do not have subspecies in the lowlands different than the subspecies in the mountains or that are represented by too little material from the Grand Mesa to be evaluated critically are Myotis evotis, Myotis volans, Spermophilus variegatus, Eutamias quadrivittatus, Castor canadensis, Ondatra zibethicus, erethizon dorsatum, Mustela frenata, Taxidea taxus, Mephitis mephitis, and Odocoileus hemionus.
"Mammals of the Grand Mesa, Colorado"
Sydney Anderson
erethizon dorsatum myops Merriam Porcupine erethizon epixanthus myops Merriam, Proc.
"Mammals taken Along the Alaska Highway"
Rollin H. Baker