animal order - the order of animals

order Rodentia, Rodentia - small gnawing animals: porcupines; rats; mice; squirrels; marmots; beavers; gophers; voles; hamsters; guinea pigs; agoutis

family Hystricidae, Hystricidae - Old World porcupines

Erethizontidae, family Erethizontidae - New World arboreal porcupines

Caviidae, family Caviidae - a family of Hystricomorpha

Dasyproctidae, family Dasyproctidae - agoutis and pacas

Capromyidae, family Capromyidae - coypus

Chinchillidae, family Chinchillidae - small bushy-tailed South American burrowing rodents

Bathyergidae, family Bathyergidae - mole rats; sand rats