Abrocomidae (chinchilla rats) (1)
Bathyergidae (blesmoles and mole rats) (1)
Capromyidae (West Indian hutias) (6)
Caviidae (cavies) (1)
Chinchillidae (chinchillas and viscachas) (2)
Cricetidae (54)
Ctenomyidae (13)
Dasyproctidae (2)
Dipodidae (3)
Echimyidae (spiny rats) (9)
Erethizontidae (New World porcupines) (1)
Geomyidae (pocket gophers) (3)
Heteromyidae (kangaroo rats, pocket mice, and relatives) (5)
Muridae (71)
Nesomyidae (7)
Octodontidae (degus, rock rats, and viscacha rats) (3)
Sciuridae (squirrels) (17)
Spalacidae (4)

(...) = Species count