Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Carnivora Bowdich, 1821 - carnivores
       Suborder Caniformia Kretzoi, 1943
         Family Mustelidae Batsch, 1788 - weasels, badgers, skunks, and otters
           Subfamily Mustelinae Batsch, 1788 - weasels
             Genus Mustela Linnaeus, 1758 - weasels, ermines, stoats, minks, ferrets, and polecats
               Mustela frenata Lichtenstein, 1831 - long-tailed weasel
                 01 [Mustela frenata frenata] Lichtenstein, 1831
                 02 Mustela frenata affinis Gray, 1874
                 03 Mustela frenata agilis Tschudi, 1844
                 04 Mustela frenata alleni (Merriam, 1896)
                 05 Mustela frenata altifrontalis Hall, 1936
                 06 Mustela frenata arizonensis (Mearns, 1891)
                 07 Mustela frenata arthuri Hall, 1927
                 08 Mustela frenata aureoventris Gray, 1864
                 09 Mustela frenata boliviensis Hall, 1938
                 10 Mustela frenata costaricensis Goldman, 1912
                 11 Mustela frenata effera Hall, 1936
                 12 Mustela frenata goldmani (Merriam, 1896)
                 13 Mustela frenata gracilis (Brown, 1908)
                 14 Mustela frenata helleri Hall, 1935
                 15 Mustela frenata inyoensis Hall, 1936
                 16 Mustela frenata latirostra Hall, 1936
                 17 Mustela frenata leucoparia Merriam, 1896
                 18 Mustela frenata longicauda Bonaparte, 1838
                 19 Mustela frenata macrophonius (Elliot, 1905)
                 20 Mustela frenata munda (Bangs, 1899)
                 21 Mustela frenata neomexicanus (Barber & Cockerell, 1898)
                 22 Mustela frenata nevadensis Hall, 1936
                 23 Mustela frenata nicaraguae Allen, 1916
                 24 Mustela frenata nigriauris Hall, 1936
                 25 Mustela frenata notius (Bangs, 1899)
                 26 Mustela frenata noveboracensis (Emmons, 1840)
                 27 Mustela frenata occisor Bangs, 1899
                 28 Mustela frenata olivacea Howell, 1913
                 29 Mustela frenata oregonensis (Merriam, 1896)
                 30 Mustela frenata oribasus (Bangs, 1899)
                 31 Mustela frenata panamensis Hall, 1932
                 32 Mustela frenata peninsulae (Rhoads, 1894)
                 33 Mustela frenata perda (Merriam, 1902)
                 34 Mustela frenata perotae Hall, 1936
                 35 Mustela frenata primulina Jackson, 1913
                 36 Mustela frenata pulchra Hall, 1936
                 37 Mustela frenata saturata (Merriam, 1896)
                 38 Mustela frenata spadix (Bangs, 1896)
                 39 Mustela frenata texensis Hall, 1936
                 40 Mustela frenata tropicalis (Merriam, 1896)
                 41 Mustela frenata washingtoni (Merriam, 1896)
                 42 Mustela frenata xanthogenys Gray, 1843