Holochilus chacarius 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Rodentia Cricetidae

Scientific Name: Holochilus chacarius
Species Authority: Thomas, 1906
Common Name(s):
English Chaco Marsh Rat

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Weksler, M., Brito, D., Pardinas, U., Jayat, J.P. & Teta, P.
Reviewer(s): Amori, G. (Small Nonvolant Mammal Red List Authority) & Schipper, J. (Global Mammal Assessment Team)
This species is listed as Least Concern in view of its wide distribution, presumed large population, occurrence in a number of protected areas and because it is unlikely to be declining at nearly the rate required to qualify for listing in a threatened category.
Previously published Red List assessments:
1996 Lower Risk/least concern (LR/lc)

Geographic Range [top]

Range Description: This species occurs in Paraguay and northeastern Argentina (Musser and Carleton 2005). Provinces of Tucuman, Salta, Jujuy, Formosa, Chaco, Cordoba in Argentina).
Countries occurrence:
Argentina; Paraguay
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is uncommon to common.
Current Population Trend: Decreasing
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: Wetlands in several biomas including the Chaco - is not found in Yungas. This is a semi aquatic rodent.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): There are no major threats to the species in Paraguay (Weksler pers. comm.).

Conservation Actions [top]

Conservation Actions: The species occurs in a number of protected areas.

Classifications [top]

3. Shrubland -> 3.5. Shrubland - Subtropical/Tropical Dry
suitability: Suitable  
5. Wetlands (inland) -> 5.3. Wetlands (inland) - Shrub Dominated Wetlands
suitability: Suitable  
5. Wetlands (inland) -> 5.4. Wetlands (inland) - Bogs, Marshes, Swamps, Fens, Peatlands
suitability: Suitable  

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education

Bibliography [top]

IUCN. 2008. 2008 IUCN Red List of Threatened Species. Available at: (Accessed: 5 October 2008).

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.

Citation: Weksler, M., Brito, D., Pardinas, U., Jayat, J.P. & Teta, P. 2008. Holochilus chacarius. The IUCN Red List of Threatened Species 2008: e.T10218A3183785. . Downloaded on 29 November 2015.
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