| Myocastor Temporal range: Late Miocene - Recent
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| Nutria (Myocastor coypus) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Rodentia |
| Family: | Echimyidae |
| Subfamily: | Echimyinae |
| Tribe: | Myocastorini |
| Genus: | Myocastor Kerr, 1792 |
| Species | |
Myocastor is a genus of rodent that contains the living nutria (or coypu), as well as several fossil species.