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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 ,
— from Mammals of the Grand Mesa, Colorado by Sydney Anderson
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