The Napo spiny rat (''Proechimys quadruplicatus'') is a spiny rat species found in

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 ...

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

Ecuador Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contain ...

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and

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Phylogeny

Morphological characters and mitochondrial cytochrome b DNA sequences showed that ''P. quadruplicatus'' belongs to the so-called ''goeldii'' group of ''Proechimys'' species, and shares closer phylogenetic affinities with the other members of this clade: '' P. steerei'' and '' P. goeldii''.

References

Proechimys Mammals of Colombia Fauna of the Amazon Mammals described in 1948 Taxa named by Philip Hershkovitz {{Echimyidae-stub