The gray leaf-eared mouse (''Graomys griseoflavus'') is a

rodent Rodents (from Latin , 'to gnaw') are mammals of the Order (biology), order Rodentia ( ), which are characterized by a single pair of continuously growing incisors in each of the upper and Mandible, lower jaws. About 40% of all mammal specie ...

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

from

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...

. It is found in

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

Bolivia Bolivia, officially the Plurinational State of Bolivia, is a landlocked country located in central South America. The country features diverse geography, including vast Amazonian plains, tropical lowlands, mountains, the Gran Chaco Province, w ...

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

and

Paraguay Paraguay, officially the Republic of Paraguay, is a landlocked country in South America. It is bordered by Argentina to the Argentina–Paraguay border, south and southwest, Brazil to the Brazil–Paraguay border, east and northeast, and Boli ...

; its habitat includes the

Gran Chaco The Gran Chaco or simply Chaco is a sparsely populated, hot and semiarid lowland tropical dry broadleaf forest natural region of the Río de la Plata basin, divided among eastern Bolivia, western Paraguay, northern Argentina, and a portion o ...

. This is a variable and widely distributed species that can be found in many habitat types. It is considered to be a

species complex In biology, a species complex is a group of closely related organisms that are so similar in appearance and other features that the boundaries between them are often unclear. The taxa in the complex may be able to hybridize readily with each oth ...

, and some populations might be considered separate species. Genus ''

Graomys ''Graomys'' is a genus of rodent in the family Cricetidae. It contains the following species: * Central leaf-eared mouse (''Graomys chacoensis'') * Pale leaf-eared mouse (''Graomys domorum'') * Edith's leaf-eared mouse Edith's leaf-eared mouse ...

'' contains species once considered to be part of the complex.Ferro, L. I. and J. J. Martínez
Molecular and morphometric evidence validates a Chacoan species of the grey leaf-eared mice genus ''Graomys'' (Rodentia: Cricetidae: Sigmodontinae).
''Mammalia'' 73:3 265-71. September 2009.

Notes

References

* Graomys Mammals of Argentina Mammals of Bolivia Rodents of Brazil Mammals of Paraguay Mammals described in 1837 {{Sigmodontinae-stub