''Hylaeamys acritus'', formerly ''Oryzomys acritus'', is an oryzomyine

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

of the family

Cricetidae The Cricetidae are a family of rodents in the large and complex superfamily Muroidea. It includes true hamsters, voles, lemmings, muskrats, and New World rats and mice. At almost 608 species, it is the second-largest family of mammals, and h ...

. The name is derived from the Greek word ακριτος 'confused, doubtful', because it could easily be confused with species such as ''H. megacephalus'' and ''Euryoryzomys nitidus''. It is known only from northeastern Bolivia; its type locality is within

Noel Kempff Mercado National Park Noel Kempff Mercado National Park is a national park in northeast Santa Cruz Department (Bolivia), Santa Cruz Department, Province of José Miguel de Velasco, Bolivia, on the border with Brazil. Description Noel Kempff Mercado National Park cover ...

. The rodent is terrestrial and is found in moist lowland semideciduous forest and

savanna A savanna or savannah is a mixed woodland- grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to ...

. It has olive brown coloration on its back; the cheeks and flanks are amber, and the top of the head is dark. The coat is 9 mm long at the center of the torso. Chest fur between the front legs is thick and 3 to 4 mm long. Abdominal hairs are gray at the base and white at the top.

References

* * Hylaeamys Mammals of Bolivia Mammals described in 2005 Taxa named by Louise H. Emmons {{Sigmodontinae-stub