Family ECHIMYIDAE Gray, 1825

A South American species, the coypu Myocastor coypus, has been introduced in Korea. Myocastor coypus was formerly classified as a single species in the Family Myocastoridae (Carleton & Musser 2005) . Molecular evidence supported the placement of the coypu as a monotypic Subfamily ( Myocastorinae) under the Family Echimyidae (Galewski et al. 2005; Upham & Patterson 2012).