Family: Anomaluridae (scaly-tailed squirrels)
Family: Aplodontiidae (mountain beaver)
Family: Castoridae (beavers)
Family: Heteromyidae (kangaroo rats, kangaroo mice)
Family: Diatomyidae (Laotian rock rat)
Family: Ctenodactylidae (gundis)
Family: Bathyergidae (African mole rats)
Family: Hystricidae (old world porcupines)
Family: Abrocomidae (chinchilla rats)
Family: Capromyidae (hutias)
Family:
Caviidae (cavies, including guinea pigs, capybara)
guinea pig (Cavia anolaimae)
Brazilian guinea pig (Cavia aperea)
Shiny guinea pig (Cavia fulgida)
guinea pig (Cavia guianae)
Intermediate guinea pig (Cavia intermedia)
Greater guinea pig (Cavia magna)
guinea pig (Cavia nana)
Montane guinea pig (Cavia tschudii)
Brandt's Yellow-toothed Cavy (Galea flavidens)
Yellow-toothed Cavy (Galea monasteriensis)
Common Yellow-toothed Cavy (Galea musteloides)
Spix's Yellow-toothed Cavy (Galea spixii)
Southern Mountain Cavy (Microcavia australis)
Andean Mountain Cavy (Microcavia niata)
Shipton's Mountain Cavy (Microcavia shiptoni)
Patagonian Mara (Dolichotis patagonum)
Chacoan Mara (Dolichotis salinicola)
Climbing Cavy (Kerodon acrobata)
Rock Cavy (Kerodon rupestris)
Family: Ctenomyidae (tuco-tucos)
Family: Dasyproctidae (agoutis)
Family: Dinomyidae (pacaranas)
Family: Echimyidae (spiny rats)
Family: Myocastoridae (nutria)
Family: Octodontidae (octodonts)
Family: Dipodidae (jerboas, jumping mice)
Family: Calomyscidae (mouse-like hamsters)
Family: Cricetidae (hamsters, new world rats, mice, voles)
Family: Gliridae (dormice)
Family: Muridae (true mice, rats, gerbils, spiny mice, crested rat)
Family: Nesomyidae (climbing mice, rock mice, white-tailed rat, Malagasy rats, mice)
Family: Pedetidae (springhares)
Family: Petromuridae (dassie rat)
Family: Platacanthomyidae (spiny dormice)
Family: Spalacidae (mole rats, bamboo rats, zokors)
Family: Thryonomyidae (cane rats)
