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

<==o †Florentiamyidae A.E. Wood, 1936 [taxonomic history]
   |-- †Ecclesimus tenuiceps (Galbreath, 1948) Korth, 1989a [Heliscomys tenuiceps Galbreath, 1948; Ecclesimus tenuiceps (Galbreath) Korth, 1989a, Korth, Wahlert & Emry, 1991] L.Olig. NA.
   |--o †Kirkomys Wahlert, 1984; L.-U.Olig. NA.
   |  |-- †K. schlaikjeri (Black, 1961) Wahlert, 1984 [Heliscomys schlaikjeri Black, 1961]
   |  `-- †K. milleri Wahlert, 1984
   |--o †Hitonkala Macdonald, 1963; U.Olig.-L.Mioc. NA.
   |  |-- †H. andersontau Macdonald, 1963
   |  `-- †H. macdonaldtau Korth, 1992a
   |--o †Sanctimus Macdonald, 1970; U.Olig.-L.Mioc. NA.
   |  |-- †S. falkenbachi Wahlert, 1983
   |  |-- †S. simonisi Wahlert, 1983 [=? †S. simonsi]
   |  |-- †S. stouti Wahlert, 1983
   |  `-- †S. stuartae Macdonald, 1970 [incl. Florentiamys kennethi Wahlert, 1983 sensu Korth, 1992a]
   |--o †Florentiamys A.E. Wood, 1936; U.Olig.-L.Mioc. NA.
   |  |-- †F. agnewi Macdonald, 1963
   |  |-- †F. kinseyi Wahlert, 1983
   |  |-- †F. loomisi A.E. Wood, 1936 [incl. Florentiamys kingi Wahlert, 1983 sensu Korth, 1992a]
   |  `-- †F. tiptoni (Macdonald, 1970) Wahlert, 1983 [Sanctimus tiptoni Macdonald, 1970]
   `--o †Fanimus Korth, Bailey & Hunt, 1990; L.Mioc. NA.
      |-- †F. ultimus Korth, Bailey & Hunt, 1990
      `-- †F. clasoni (Macdonald, 1963) Korth et al., 1990 [Pleurolicus clasoni Macdonald, 1963; Sanctimus clasoni (Macdonald, 1963) Macdonald, 1970, Rensberger, 1973c, and Wahlert, 1983; Fanimus clasoni (Macdonald)  Korth, Bailey & Hunt, 1990]

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