Classification of Nowak 1999

Subcl. Eutheria Huxley 1880 [eutherian]
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Or. †Bibymalagasia MacPhee 1994
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Fm. †Plesiorycteropodidae Patterson 1975
Or. Rodentia [rodent]
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Subor. Hystricognathi Tullberg 1899
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Fm. Bathyergidae Waterhouse 1841 [mole rat]
Infraor. Caviomorpha Wood and Patterson 1955 [caviomorph]
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Superfm. Cavioidea Fischer de Waldheim 1817
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Fm. Agoutidae Gray 1821
Fm. Caviidae Gray 1821
Fm. Dasyproctidae Gray 1825
Fm. Dinomyidae Peters 1873
Fm. Hydrochaeridae Gill 1872
Superfm. Chinchilloidea Bennett 1833
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Fm. Chinchillidae Bennett 1833 [chinchilid]
Superfm. Erethizontoidea Bonaparte 1845
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Fm. Erethizontidae Bonaparte 1845 [porcupine]
Superfm. Octodontoidea Waterhouse 1839
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Fm. Abrocomidae Miller and Gidley 1918 [chinchilla rat]
Fm. Capromyidae Smith 1842 [hutia]
Fm. Ctenomyidae Lesson 1842
Fm. Echimyidae Gray 1825 [spiny rat]
Fm. Heptaxodontidae Anthony 1917
Fm. Myocastoridae Ameghino 1902
Fm. Octodontidae Waterhouse 1839
Infraor. †Hystricomorpha
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Fm. Hystricidae Fischer de Waldheim 1817 [porcupine]
Infraor. †Phiomorpha Lavocat 1962
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Fm. Petromuridae Wood 1955
Fm. Thryonomyidae Pocock 1922 [cane rat]
Subor. †Sciurognathi Tullberg 1899
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Fm. Anomaluridae Gill 1872 [scaly-tailed squirrel]
Fm. Pedetidae Gray 1825 [springhare]
Infraor. †Castorimorpha
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Fm. Castoridae Gray 1821 [beaver]
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Fm. Ctenodactylidae Gervais 1853 [gundi]
Infraor. Glirimorpha
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Infraor. Myomorpha Brandt 1855
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Superfm. Dipodoidea Fischer 1817
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Fm. Dipodidae Waterhouse 1842
Superfm. Geomyoidea Bonaparte 1845
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Fm. Geomyidae Bonaparte 1845 [pocket gopher]
Fm. Heteromyidae Gray 1868
Superfm. Muroidea Illiger 1811 [mouse]
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Fm. Muridae Illiger 1811 [mouse]
Infraor. Protrogomorpha Zittel 1893
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Fm. Aplodontidae Brandt 1855 [mountain beaver]
Infraor. Sciuromorpha Brandt 1855
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Fm. Sciuridae Gray 1821 [squirrel]