Pará spiny tree-rat

Pará spiny tree rat
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Echimyidae
Subfamily: Echimyinae
Tribe: Echimyini
Genus: Mesomys
Species:
M. stimulax
Binomial name
Mesomys stimulax
Thomas, 1911

The Pará spiny tree rat (Mesomys stimulax) or Surinam spiny tree rat, is a spiny rat species found in Brazil. Previously, Mesomys Stimulax's karyotype was 2n=60, Fundamental number (abbreviated FN), FN=116. However more recently the new karyotype has been found to be 2n=60, FN=110. This points to the idea that this species is most likely a species complex.