Class [Mammalia] Linnaeus, 1758 - mammals Count: [*] 21o;132f;1061g;4316s; ‡1f;5g;38s Order Rodentia Bowdich, 1821 - rodents Count: [*] 29f;399g;1788s; ‡1g;16s Family Myocastoridae Ameghino, 1902 Count: [*] 1g;1s Genus Myocastor Kerr, 1792 - nutria Count: [*] 1s Myocastor coypus (Molina, 1782) R. Kerr, 1792 - coypu Count: -