Hylaeamys oniscus


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Hylaeamys oniscus
Species Authority: (Thomas, 1904)
Common Name(s):
English Sowbug Rice Rat
Oryzomys oniscus Thomas, 1904
Taxonomic Notes: Oryzomys is a generic synonym (Weksler et al. 2006).

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii) ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Percequillo, A. & Langguth, A.
Reviewer(s): Amori, G. (Small Nonvolant Mammal Red List Authority) & Schipper, J. (Global Mammal Assessment Team)
This species is listed as Endangered because its extent of occurrence is less than 20,000 km², its distribution is severely fragmented, and there is continuing decline in the extent and quality of its habitat, though it is common where it occurs.

Geographic Range [top]

Range Description: This species occurs along the Atlantic forest coast from Pernambuco State to northern Bahia State, Brazil (Eisenberg and Redford, 1999).
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is locally common.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: This species has not been captured outside of forested areas and is cuurently confined to mosaics of severely fragmented remaining forested areas within a limited range.
Systems: Terrestrial

Threats [top]

Major Threat(s): The major threats are habitat destruction, fragmentation and deforestation for sugar cane plantations. This species has a limited range in an area where much of the forest has been converted to agriculture and livestock.

Conservation Actions [top]

Conservation Actions: This species occurs in several protected areas, including Biological Reserve Saltinho.

Bibliography [top]

Eisenberg, J.F. and Redford, K.H. 1999. Mammals of the Neotropics: The Central Neotropics. The University of Chicago Press, Chicago, USA.

Musser, G. G. and Carleton, M. D. 2005. Superfamily Muroidea. In: D. E. Wilson and D. A. Reeder (eds), Mammal Species of the World: a geographic and taxonomic reference, pp. 894-1531. The John Hopkins University Press, Baltimore, USA.

Weksler, M., Percequillo, A. R. and Voss, R. S. 2006. Ten new genera of Oryzomyine rodents (Cricetidae: Sigmodontinae). American Museum Novitates 3537: 1-29.

Citation: Percequillo, A. & Langguth, A. 2008. Hylaeamys oniscus. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 27 August 2015.
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