Akodon montensis 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Rodentia Cricetidae

Scientific Name: Akodon montensis Thomas, 1913
Common Name(s):
English Montane Akodont, Montane Grass Mouse
Taxonomic Notes: Subgenus Akodon, A. cursor species group (Rieger et al. 1995). Originally named as a subspecies of A. arviculoides, a ranking observed by Gyldenstolpe (1932) and Cabrera (1961). Where A. cursor and A. montensis occur in proximity, the latter species is found at higher elevations, 800 m and above (Geise et al. 2001). Past reports for this species in Uruguay (e.g., Ximénez and Langguth 1970) have proven to be A. reigi (González et al. 1998).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-09-08
Assessor(s): Pardinas, U., D'elia, G., Fagundes, V., Christoff, A. & Geise, L.
Reviewer(s): Amori, G.
This species is listed as Least Concern in view of its wide distribution, presumed large population, it occurs 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:

Geographic Range [top]

Range Description:This species occurs from east Paraguay (Gamarra de Fox and Martin, 1996), northeast Argentina (Pardiñas et al. 2003), and southeast Brazil (Rio de Janeiro to Rio Grande do Sul, including gallery forest settings in Minas Gerais and Goiás) (Geise et al. 2001, Rieger et al. 1995). In Brazil, the species occurs from coastal areas inland to eastern Mato Grosso do Sul.
Countries occurrence:
Brazil; Paraguay
Additional data:
Lower elevation limit (metres):800
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It is an abundant species.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:The species inhabits Atlantic forest and cerrado. Akodon montensis has been collected only above 800 m in Rio de Janeiro State, and in northern-most areas of its distribution it occurs above 900 m. Species occurs in gallery forest along creeks and streams (Pardiñas et al. 2005).
Generation Length (years):1-2

Threats [top]

Major Threat(s): Although there are no major threats to the species, the Atlantic forest populations are affected by habitat destruction.

Conservation Actions [top]

Conservation Actions: The species occurs in protected areas throughout its range (Fagundes pers. comm.). At present the efficient method of identifying species is using karyotyping (2n = 24, 25, 26) (Fagundes pers. comm.).

Errata [top]

Errata reason: This errata assessment has been created because the map was accidentally left out of the version published previously.

Classifications [top]

1. Forest -> 1.5. Forest - Subtropical/Tropical Dry
1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
2. Savanna -> 2.1. Savanna - Dry
5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
5. Wetlands (inland) -> 5.2. Wetlands (inland) - Seasonal/Intermittent/Irregular Rivers/Streams/Creeks

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]

Cabrera, A. 1961. Catílogo de los mamíferos de America del Sur. Revista del Museo Argentino de Ciencias Naturales Bernardino Rivadavia 4: 309-732.

Gamarra De Fox, I. and Martin, A. J. 1996. Lista de mamiferos del Paraguay. In: O. Romero (ed.), Colecciones de fauna y flora del Museo Nacional de la Historia Natural del Paraguay, pp. 469-573. Direccion de Parques Nacionales y Vida Silvestre, Asuncion, Paraguay, Asuncion, Paraguay.

Geise, L., Smith, M.F. and Patton, J.L. 2001. Diversification in the genus Akodon (Rodentia: Sigmodontinae) in Southeastern South America: mitochondrial DNA sequence analysis. Journal of Mammalogy 82(1): 92-101.

IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-3. Available at: (Accessed: 07 December 2016).

IUCN. 2017. The IUCN Red List of Threatened Species. Version 2017-1. Available at: (Accessed: 27 April 2017).

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.

Pacifici, M., Santini, L., Di Marco, M., Baisero, D., Francucci, L., Grottolo Marasini, G., Visconti, P. and Rondinini, C. 2013. Generation length for mammals. Nature Conservation 5: 87–94.

Pardinas, U. F. J., Teta, P., Cirignoli, S. and Podesta, D. H. 2003. Micromamiferos (Didelphimorphia y Rodentina) de Norpatagonia Extra Andina, Argentina: Taxonomia Alfa y Biogeografia. Mastozoología Neotropical 10(1): 69-113.

Rieger, T.T., Langguth, A. and Weimer, A. 1995. Allozymic characterization and evolutionary relationships in the Brazilian Akodon cursor species group (Rodentia: Cricetidae). Biochemical Genetics 33: 283-295.

Ximenez, A. and Langguth, A. 1970. Akodon cursor montensis en el Uruguay (Mammalia-Cricetinae). Comunicaciones Zoologicas del Museo de Historia Natural de Montevideo 10(128): 1-7.

Citation: Pardinas, U., D'elia, G., Fagundes, V., Christoff, A. & Geise, L. 2016. Akodon montensis (errata version published in 2017). The IUCN Red List of Threatened Species 2016: e.T136197A115204938. . Downloaded on 24 September 2018.
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