| Kingdom | Phylum | Class | Order | Family |
|---|---|---|---|---|
| ANIMALIA | CHORDATA | MAMMALIA | RODENTIA | CRICETIDAE |
| Scientific Name: | Oryzomys nelsoni | |||
| Species Authority: | Merriam, 1898 | |||
Common Name/s:
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| Red List Category & Criteria: | Extinct ver 3.1 | |||||||||
| Year Assessed: | 2008 | |||||||||
| Assessor/s | Timm, R., Álvarez-Castañeda, S.T. & Lacher, T. | |||||||||
| Evaluator/s: | McKnight, M. (Global Mammal Assessment Team) & Amori, G. (Small Nonvolant Mammal Red List Authority) | |||||||||
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Justification: 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. |
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| History: |
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| Range Description: | This species is known only from the type locality in Nayarit State, México: María Madre Island (Musser and Carleton 2005). |
| Countries: |
Regionally extinct:
Mexico
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| 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). |
| Systems: | Terrestrial |
| Major Threat(s): | The extinction of the species may have been caused by Rattus rattus (Wilson 1991 in Alvarez-Castañeda and Mendez 2003). |
| Conservation Actions: | None. |
| Citation: | Timm, R., Álvarez-Castañeda, S.T. & Lacher, T. 2008. Oryzomys nelsoni. In: IUCN 2009. IUCN Red List of Threatened Species. Version 2009.2. <www.iucnredlist.org>. Downloaded on 21 November 2009. |
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