|Scientific Name:||Monodelphis dimidiata|
|Species Authority:||(Wagner, 1847)|
Didelphis brachyura Waterhouse, 1839
Didelphis henseli Matschie, 1916
Didelphis lundi Matschie, 1916
Didelphys dimidiata Wagner, 1847
Monodelphis fosteri Thomas, 1924
Monodelphis sorex (Hensel, 1872)
Peramys dimidiata subspecies itatiayae A. Miranda-Ribeiro, 1936
Peramys sorex Thomas, 1909
|Taxonomic Notes:||Populations from southern Brazil and Northeastern Argentina usually assigned to M. sorex, are now placed under synonymy with M. dimidiata (Vilela et al. 2010, Solari 2010). M. dimidiata is the type species of the genus name Peramys Lesson 1842, by subsequent designation and of Minuania Cabrera 1919, by original designation, same as M. sorex being the type species of Monodelphiops Matschie 1916. Because of synonymy of these two species names, all three genus names become synonyms too; with Peramys being the senior one (see Solari 2010). At this time, Peramys is a junior synonym (or subgenus) of Monodelphis.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor/s:||Brito, D., Vilela, J., Flores, D. & Teta, P.|
|Reviewer/s:||Solari, S. & Chiozza, F.|
This species is listed as Least Concern in because of its wide distribution, occurrence in a number of protected areas, tolerance to some degree of habitat modification, and because it is unlikely to be declining at the rate required to qualify for listing in a threatened category. This species is in decline and further investigations into rates of decline and adaptability to disturbed habitat could indicate that this species is or will be Near Threatened, however, inference from current knowledge suggests Least Concern is more appropriate at this time.
|Range Description:||This species occurs in Uruguay, southeastern Brazil, southeastern Paraguay and central and northern Argentina (Gardner 2007). The populations from the Atlantic Forest assigned traditionally to M. sorex, are now considered as conspecific with M. dimidiata (Vilela et al. 2010, Solari 2010).|
Native:Argentina; Brazil; Uruguay
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species can be common in the appropriate habitats (see Pine et al. 1985). Remaining populations of this species have been reduced to isolated fragments of their former range. In southeastern Brazil, northeastern Argentina and southern Paraguay, the population may be larger than thought as surveys have been inadequate.|
|Habitat and Ecology:||This species is found in pastures, wetlands, pampas grasslands, and riparian areas next to waterways. Founded also in Atlantic coast rainforest (Eisenberg and Redford 1999, Emmons and Feer 1997).|
|Major Threat(s):||No major threats occur to the species, although numerous populations are threatened by habitat conversion to agriculture or urbanized areas.|
|Conservation Actions:||M. dimidiata occurs in a number of protected areas in Brazil.|
Eisenberg, J. F. and Redford, K. H. 1999. Mammals of the Neotropics: The Central Neotropics. The University of Chicago Press, Chicago, USA.
Emmons, L. H. and Feer, F. 1997. Neotropical Rainforest Mammals: A Field Guide, Second edition. University of Chicago Press, Chicago, IL, USA.
Gardner, A. L. 2007. Order Didelphimorphia. In: A. L. Gardner (ed.), Mammals of South America, pp. 669. University of Chicago Press, Chicago, USA.
IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.2). Available at: http://www.iucnredlist.org. (Accessed: 10 November 2011).
Pine, R.H., Dalby, P.L. and Matson, J.O. 1985. Ecology, postnatal development, morphometrics, and taxonomic status of the short-tailed opossum, Monodelphis dimidiata, an apparently semelparous annual marsupial. Annals of the Carnegie Museum 54: 195–231.
Solari, S. 2010. A molecular perspective on the diversification of short-tailed opossums (Monodelphis: Didelphidae). Mastozoología Neotropical 17(2): 317-333.
Vilela, J.F., Russo, C.A. de M. and Oliveira, J.A.de. 2010. An assessment of morphometric and molecular variation in Monodelphis dimidiata (Wagner, 1847) (Didelphimorphia: Didelphidae). Zootaxa 2646: 26-42.
|Citation:||Brito, D., Vilela, J., Flores, D. & Teta, P. 2011. Monodelphis dimidiata. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 09 March 2014.|
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