Castoridae
Family within Rodentia
Agnotocastor
Anchitheriomys
Capacikala
Castor
Castoroides
Dipoides
Eucastor
Euhapsis
Euroxenomys
Fossorcastor
Microdipoides
Migmacastor
Monosaulax
Neatocastor
Nothodipoides
Oligotheriomys
Palaeocastor
Priusaulax
Procastoroides
Prodipoides
Propalaeocastor
Pseudopalaeocastor
Steneofiber
Trogontherium
Youngofiber