Comments: Included in the Capromyidae or Echimyidae by some authors; placed in the Myocastoridae by Baker et al. (2003) and Woods and Kilpatrick (in Wilson and Reeder 2005).
Baker et al. (2003) applied the common name "Nutria or Coypu" whereas Woods and Kilpatrick (in Wilson and Reeder 2005) selected "Coypu" as the best choice because "Nutria" in Spanish means otter.
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