Myocastor coypus
Myocastor coypus est species magnarum et aquaticorum mammalium herbivororum ordinis Rodentium. Myocastor diu erat solum genus in familiam Myocastoridarum digestum, sed nunc intra Echimyidas, familiam rattorum spinosorum, digeritur. Prope corpora aquae habitant, ubi se in latibulis tegunt et caulibus plantarum fluviatilium vescuntur. Quae animalia, olim in subtropicis temperatisque Americae Australis regionibus endemica, in Americam Septentrionalem, Europam, Asiam, et Africam plerumque ab agricolis pellis introducta sunt. Quamquam homines Myocastores coypus iam in nonnullis regionibus venantur et irretiunt, eius fossae et diaeta hominibus saepe incommodae sunt, unde species invasiva late habetur.

Taxinomia 
Myocastor coypus primum ab Ioanne Ignatio Molina anno 1782 nomine Mure coypus descriptus est, species generis Muris. Species vicissim generi Myocastori anno 1792 a Roberto Kerr tributa est.
Geoffroy Saint-Hilaire, separatim a Kerr, speciem Myopotamum coypus nominavit, quae aliquando sic appellatur.

Quattuor subspecies late agnoscuntur.
 M. c. bonariensis: (Argentina septentrionalis), Bolivia, Paraquaria, Uraquaria, Brasilia australis (RS, SC, PR, SP)
 M. c. coypus: Tsilia media, Bolivia
 M. c. melanops: Chiloé Insula
 M. c. santacruzae: Patagonia

M. c. bonariensis, subspecies in maxime septentrionali (subtropica) distributionis geographicae regione praesens, typus creditur qui in alias continentes introductus est.

Phylogenia 
Sequentiae DNA et proteinorum genus Myocastorem esse gregem sororium generis Callistomys monstrant. Quae bina taxa vicissim coniunctiones evolutionarias cum aliis Myocastorinorum generibus partiunt, quae hic Proechimys et Hoplomys, ibi Thrichomys sunt.

Proprietates 
Myocastor coypus permagni ratti vel castoris minime caudati aliquantulum similis est. Corpus adulti plerumque est a 4 ad 9 chiliogrammata ponderis et a 40 ad 60 centimetra longum; cauda a 30 ad 45 centimetra longa. Adultus usque ad 16 vel etiam 17 chiliogrammata esse potest, sed medium inter adultos plerumque est a 4.5 ad 7 chiliogrammata. Pellis externa crassa et atrobrunnea, pellis interna mollis et cana est. Tres proprietates distinctae sunt regio alba in anteriori rostri parte, pedes posteriores digitis cuti coniunctis, et magni incisores aurantii flavique clari. Papillae feminarum in summis cruribus sunt, ut pulli sugant cum femina in aqua sit.

Pinacotheca 

 Hydrochoerus hydrochaeris

Notae

Bibliographia 
 Bertolino, Sandro, Aurelio Perrone, et Laura Gola. 2005. "Effectiveness of coypu control in small Italian wetland areas." Wildlife Society Bulletin 33, no. 2 (Iunius): 714–72.
 Carter, Jacoby. 2007. Worldwide Distribution, Spread of, and Efforts to Eradicate the Nutria (Myocastor coypus) – South America. Vasingtoniae: United States Geological Survey.
 Carter, Jacoby, A. L. Foote, et L. A. Johnson-Randall. 1999. "Modeling the effects of nutria (Myocastor coypus) on wetland loss." Wetlands 19 (1): 209–19.
 Carter, Jacoby, et Billy P. Leonard. 2002. "A Review of the Literature on the Worldwide Distribution, Spread of, and Efforts to Eradicate the Coypu (Myocastor coypus)." Wildlife Society Bulletin 30, no. 1 (ver): 162–75.
 Galewski, Thomas, Jean-François Mauffrey, Yuri L. R. Leite, James L. Patton, et Emmanuel J. P. Douzery. 2005. "Ecomorphological diversification among South American spiny rats (Rodentia; Echimyidae): a phylogenetic and chronological approach." Molecular Phylogenetics and Evolution 34, no. 3 (Martius): 601–615. ISSN 1055-7903. doi:10.1016/j.ympev.2004.11.015.
 Klapperstück, Johannes. (1964) 2004. Der Sumpfbiber. (Nutria). Die Neue Brehm-Bücherei, 115. Ed. tertia. Hohenwarsleben: Westarp-Wissenschaften-Verlags-Gesellschaft. ISBN 3-89432-162-8.
 Ludwig, Mario, Harald Gebhard, Herbert W. Ludwig, et Susanne Schmidt-Fischer. 2000. Neue Tiere & Pflanzen in der heimischen Natur: Einwandernde Arten erkennen und bestimmen. Monaci: BLV. ISBN 3-405-15776-5.
 Nolfo-Clements, Lauren E. 2006. "Seasonal variations in habitat availability, habitat selection, and movement patterns of Myocastor coypus on a subtropical freshwater floating marsh." Dissertation. Tulane University. ISBN 0-542-60916-9.
 Sheffels, Trevor, et Mark Systma. 2007. "Report on Nutria Management and Research in the Pacific Northwest." Center for Lakes and Reservoir Environmental Sciences and Resources, Portland State University. December 2007. PDF, editio interretialis.
 Vallance, Michel. 2007. Faune sauvage de France: biologie, habitats et gestion.'' Le gerfaut. ISBN 9782351910306. Google Books.

Nexus externi 

 "Rodents of Unusual Size." Pellicula documentaria de hoc animale in Ludovicianam introducto
 "Chesapeake Bay Nutria Eradication Project." United States Fish and Wildlife Service.
 "Report on coypus in the Pacific Northwest of North America." Portland State University.
 "Species Profile - Nutria (Myocastor coypus)." National Invasive Species Information Center, United States National Agricultural Library.

Fauna Americae Meridionalis
Fauna Angoliae
Fauna Brasiliae
Fauna Paraquariae
Fauna Uraquariae
Fauna Tanzaniae
Mammalia Africae
Mammalia Americae Septentrionalis
Mammalia aquatica
Mammalia Argentinae
Mammalia Asiae
Mammalia Atropatenae
Mammalia Boliviae
Mammalia Chiliae
Mammalia Civitatum Foederatarum
Mammalia Europae
Mammalia herbivora
Mammalia Keniae
Species animalium
Taxa Molina
Taxa 1782