Roberto's spiny-rat (''Proechimys roberti'') or Para spiny rat, is a spiny rat species found in

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. Morphological, karyological, and

mitochondrial DNA Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, such as adenosine triphosphate (ATP). Mitochondrial D ...

(cytochrome b) data indicate that ''Proechimys oris'' is likely a junior synonym of ''P. roberti''.

Phylogeny

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

References

Proechimys Mammals described in 1901 Taxa named by Oldfield Thomas {{Echimyidae-stub