Roberto's spiny rat
Roberto's spiny-rat, "Proechimys roberti", or Para spiny rat, is a spiny rat species from South America. It is found in Brazil. Morphological, karyological, and mitochondrial DNA (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".