Taxonomic history of the genus Nannospalax

After McKenna & Bell, 1997

    Nannospalax Palmer, 1903
        Microspalax Nehring, 1898 (nomen nudum)
            (non Microspalax Megnin & Trouessart, 1885, a spider-genus)
        Nannospalax Palmer, 1903
        Microspalax Méhely, 1909
        Ujhelyiana Strand, 1922
      including:
        Mesospalax Nehring, 1897 (nomen nudum)
        Mesospalax Méhely, 1909

Reference(s):

McKenna, M. C. & Bell, S. K., (eds.) 1997: Classification of mammals – above the species level.
–Columbia University Press, New York, 1997, xii-631