After Mckenna & Bell, 1997, and Alroy, 2002-2005

    Erethizon F. Cuvier, 1822
        Eretizon Cuvier, 1825
        Erethison Cuvier, 1829
        Erithizon Burnett, 1830
        Eretison McMurtrie, 1831
        Erythizon Alston, 1876

        †Erethizon poyeri Hulbert, 1997

        †Erethizon bathygnathum R.W. Wilson, 1935
            †Erethizon bathygnathum R.W. Wilson, 1935
            †Coendou bathygnathum (Wilson); J. White, 1968
            †Coendou bathygnathum (Wilson); J. White, 1970
            †Coendou bathygnathum (Wilson); Kurtén & Anderson, 1980
            †Erethizon bathygnathum Wilson; Frazier, 1981
            †Erethizon bathygnathum Wilson; Hulbert, 1997
            †Erethizon bathygnathum Wilson; Alroy, 2002-2005
          including:Coendou stirtoni J. White, 1968
              = †Erethizon bathygnathum Wilson; Frazier, 1981
              = †Erethizon bathygnathum Wilson; Albright, 1999c

        †Erethizon cascoensis (J. White, 1970)
            †Coendou cascoensis J. White, 1970
            †Erethizon cascoensis (White); Frazier, 1981
            †Erethizon cascoensis (White); Hulbert, 1997
            †Erethizon cascoensis (White); Albright, 1999c
            †Erethizon cascoensis (White); Alroy, 2002-2005

        †Erethizon kleini Frazier, 1981

        Erethizon dorsatum (Linnaeus, 1758)
            Hystrix dorsata Linnaeus, 1758
            Erethizon dorsatum (Linnaeus); F. Cuvier, 1822
            Erethizon dorsatum (Linnaeus); Kurtén & Anderson, 1980
            Erethizon dorsatum (Linnaeus); Frazier, 1981
            Erethizon dorsatum (Linnaeus); Hulbert, 1997
          including:
            Erethizon cloacinum Cope, 1871
              = Erethizon dorsatum (Linnaeus); Frazier, 1981
            Erethizon godfreyi Allen, 1904
              = Erethizon dorsatum (Linnaeus); J. White, 1970
              = Erethizon dorsatum (Linnaeus); Frazier, 1981
            Coendou cumberlandicus J. White, 1970
              = Erethizon dorsatum (Linnaeus); Frazier, 1981

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