After McKenna & Bell, 1997, Alroy, 2002-2005, and “NMNH Mammalian specieslist”, 2003-2005

<==o Perognathus Wied-Neuwied, 1839 [Peraganthus Brandt; 1855 (lapsus calami?] [incl. Cricetodipus Peale, 1848; Abromys, Gray, 1868; Otognosis Coues, 1875]
   |-- †P. ancenensis Sutton & Korth, 1995
   |-- †P. brevidens Korth, 1987
   |-- †P. carpenteri Dalquest, 1978
   |-- †P. cragini
   |-- †P. dunklei Hibbard, 1939
   |-- †P. furlongi Gazin, 1930
   |-- †P. gidleyi Hibbard, 1941
   |-- †P. henryredfieldi Jacobs, 1977
   |-- †P. maldei Zakrzewski, 1969
   |-- †P. mclaughlini Hibbard, 1949c
   |-- †P. minutus James, 1963
   |-- †P. pearlettensis Hibbard, 1941d
   |-- †P. rexroadensis Hibbard, 1950
   |-- †P. stevei J. Martin, 1984
   |-- †P. strigipredus Czaplewski, 1990
   |-- †P. trojectioansrum Korth, 1979
   |-- P. alticola Rhoads, 1894 [ssp. => P. parvus] (White-eared Pocket Mouse)
   |-- P. amplus Osgood, 1900 (Arizona Pocket Mouse)
   |-- P. fasciatus Wied-Neuwied, 1839 (Olive-backed Pocket Mouse)
   |--o P. flavescens C. Merriam, 1889 [incl. Perognathus apache C. Merriam, 1889] (Plains Pocket Mouse)
   |  |-- P. f. apache C. Merriam, 1889 [Perognathus apache C. Merriam, 1889; Hoffmeister, 1986; = Perognathus flavescens Merriam; Williams, 1978, Hall, 1981, Patton, 1993, and Czaplewski et al., 1999]
   |  `-- P. f. flavescens C. Merriam, 1889
   |--o P. flavus Baird, 1855 (Silky Pocket Mouse)
   |  |-- P. f. flavus Baird, 1855
   |  `-- P. f. bunkeri Cockrum
   |?- P. goldmani
   |-- P. inornatus Merriam, 1889 (San Joaquin Pocket Mouse)
   |-- P. intermedius
   |-- P. longimembris (Coues, 1875) (Little pocket mouse)
   |?- P. penicillatus
   |-- P. merriami J.A. Allen, 1892 (Merriam's Pocket Mouse)
   |-- P. parvus (Peale, 1848); Kurtén & Anderson, 1980 [Cricetodipus parvus Peale, 1848] (Great Basin Pocket Mice)
   `-- P. xanthanotus Grinnell, 1912 (Yellow-eared Pocket Mouse)

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