Class [Mammalia] Linnaeus, 1758 - mammals
Count: [*] 21o;132f;1061g;4316s; ‡1f;5g;38s
Order Rodentia Bowdich, 1821 - rodents
Count: [*] 29f;399g;1788s; ‡1g;16s
01 Family Aplodontidae Trouessart, 1897, orth. inval. - sewellel
see Family Aplodontiidae Brandt, 1855
Count: [*] 1g;1s
02 Family Sciuridae Batsch, 1788 - squirrels, chipmunks, marmots, and prairie dogs
Count: [*] 49g;259s
03 Family Geomyidae Bonaparte, 1845 - pocket gophers
Count: [*] 5g;35s
04 Family Heteromyidae Gray, 1868 - pocket mice, kangaroo rats, and kangaroo mice
Count: [*] 6g;60s
05 Family Castoridae Batsch, 1788 - beavers
Count: [*] 1g;2s
06 Family Anomaluridae Gervais, 1849 - scaly-tailed squirrels
Count: [*] 3g;7s
07 Family Pedetidae Gray, 1825 - springhare
Count: [*] 1g;1s
08 Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
Count: [*] 255g;1149s; ‡1g;16s
09 Family Gliridae Muirhead, 1819 - dormice
Count: [*] 8g;20s
10 Family Seleviniidae Bashanov & Belosludov, 1939 - desert dormouse
see Subtribe Seleviniina Bashanov & Belosludov, 1939
Count: [*] 1g;1s
11 Family Zapodidae Coues, 1875 - jumping mice
Count: [*] 4g;17s
12 Family Dipodidae Fischer de Waldheim, 1817 - jerboas
Count: [*] 10g;30s
13 Family Hystricidae Fischer de Waldheim, 1817 - Old World porcupines
Count: [*] 3g;11s
14 Family Erethizontidae Bonaparte, 1845 - New World porcupines
Count: [*] 4g;10s
15 Family Caviidae Fischer de Waldheim, 1817 - cavies and Patagonian "hares"
Count: [*] 5g;17s
16 Family Hydrochaeridae (Gray, 1825) Cabrera, 1961 - capybara
see Family Hydrochoeridae Gray, 1825
Count: [*] 1g;1s
17 Family Dinomyidae Peters, 1873 - pacarana
Count: [*] 1g;1s
18 Family Dasyproctidae Gray, 1825 - agoutis and pacas
Count: [*] 3g;14s
19 Family Chinchillidae Bennett, 1833 - viscachas and chinchillas
Count: [*] 3g;6s
20 Family Capromyidae Smith, 1842 - hutias and nutria
Count: [*] 2g;14s
21 Family Myocastoridae Ameghino, 1902
Count: [*] 1g;1s
22 Family Octodontidae Waterhouse, 1840 - octodonts
Count: [*] 5g;9s
23 Family Ctenomyidae Lesson, 1842 - tuco-tucos
Count: [*] 1g;38s
24 Family Abrocomidae Miller & Gidley, 1918 - chinchilla-rats
Count: [*] 1g;2s
25 Family Echimyidae Gray, 1825 - spiny rats
Count: [*] 14g;63s
26 Family Thryonomyidae Pocock, 1922 - cane rats
Count: [*] 1g;2s
27 Family Petromuridae Tullberg, 1899 - dassie rat
Count: [*] 1g;1s
28 Family Bathyergidae Waterhouse, 1841 - African mole-rats
Count: [*] 5g;11s
29 Family Ctenodactylidae Gervais, 1853 - gundis
Count: [*] 4g;5s