Family Myoxidae
This family regroups all Dormice species, it is sometimes known as Gliridae.

Family Castoridae
This family regroups all Beaver species.

Castor canadensis – North American beaver

Family Petromuridae
This monotypic family has been created for the Dassie rat.

Family Ctenodactylidae
This family regroups all Gundi species.

Family Heteromyidae
This family regroups all Pocket-mice species.

Dipodomys ordii – Ord’s kangaroo-rat

Family Pedetidae
This family regroups all Springhares.