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

oryzomyine Oryzomyini is a tribe (taxonomy), tribe of rodents in the subfamily Sigmodontinae of the family Cricetidae. It includes about 120 species in about thirty genera,Weksler et al., 2006, table 1 distributed from the eastern List of mammals of the Uni ...

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 na ...

of the family Cricetidae. 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 , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

; 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