Eomyidae Procastoroides Monosaulax Dipoides Castorimorpha Steneofiber Trogontherium Youngofiber Migmacastor Diprionomys Agnotocastor Propalaeocastor Eucastor Eomys Rhizospalax Palaeocastor Anchitheriomys Metaliomys Castoroides Apeomyoides Heteromys Aurimys Kangaroo mouse Perognathus Chaetodipus Heterogeomys Cratogeomys Buller's pocket gopher Kangaroo rat Geomys Smooth-toothed pocket gopher Beaver Giant pocket gopher Michoacan pocket gopher List of prehistoric mammals of Japan 2019 in paleomammalogy