|Scientific Name:||Oryzomys nelsoni|
|Species Authority:||Merriam, 1898|
|Red List Category & Criteria:||Extinct ver 3.1|
|Assessor/s:||Timm, R., Álvarez-Castañeda, S.T. & Lacher, T.|
|Reviewer/s:||McKnight, M. (Global Mammal Assessment Team) & Amori, G. (Small Nonvolant Mammal Red List Authority)|
This species is listed as Extinct as it has not been found in recent years despite surveys. It was only known from a few records in the marsh areas of the high central part of Maria Madre Island. It was last recorded in 1897.
|Range Description:||This species is known only from the type locality in Nayarit State, México: María Madre Island (Musser and Carleton 2005).|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is known only by the four specimens of the type series. After extensive trapping that produced only a few specimens, O. nelsoni was believed to be rare (Nelson 1899 in Alvarez-Castañeda and Mendez 2003). More recent trapping in the type locality revealed only Rattus rattus (Wilson 1991 in Alvarez-Castañeda and Mendez 2003), and this species is currently considered extinct (IUCN, 2006).|
|Habitat and Ecology:||
This species occurred in damp areas near springs and close to the summit of Maria Madre. This habitat has abundant herbaceous vegetation in the undergrowth (Alvarez-Castañeda and Mendez 2003).
Nelson’s rice rat may have fed on seeds, fruits, weeds, and occasionally small fish and invertebrates (Alvarez-Castañeda and Mendez 2003).
|Major Threat(s):||The extinction of the species may have been caused by Rattus rattus (Wilson 1991 in Alvarez-Castañeda and Mendez 2003).|
Alvarez-Castaneda, S. T. and Mendez, L. 2003. Oryzomys nelsoni. Mammalian Species 735: 1-2.
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:||Timm, R., Álvarez-Castañeda, S.T. & Lacher, T. 2008. Oryzomys nelsoni. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 22 May 2013.|
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