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Ctenomys roigi 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_onStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Mammalia Rodentia Ctenomyidae

Scientific Name: Ctenomys roigi Contreras, 1988

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(i,ii)+2ab(i,ii) ver 3.1
Year Published: 2018
Date Assessed: 2016-06-20
Assessor(s): Bidau, C.J.
Reviewer(s): Amori, G.
Contributor(s): Lessa, E., Ojeda, R., McCay, S. & Tammone, M.
Justification:
Ctenomys roigi is assessed as Critically Endangered because it has a small extent of occurrence (EOO) (EOO is around 96 km²) and area of occupancy (AOO is less than 10 km²), all individuals are in a single location, and there is continuing decline in the extent and quality of its habitat.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species inhabits a small area of just 12 km long and 3 km wide along the coast of Rio Paraná in Corrientes Province in Argentina (Bidau 2015).
Countries occurrence:
Native:
Argentina
Additional data:
Estimated area of occupancy (AOO) - km2:4Continuing decline in area of occupancy (AOO):Yes
Estimated extent of occurrence (EOO) - km2:95.679
Continuing decline in extent of occurrence (EOO):Yes
Number of Locations:1
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There are only two known populations very close to each other and are considered as one locality (Bidau pers. comm). This species appears to constitute a compact entity represented by a unique population (Mirol et al. 2010). There is a continuing decline of its habitat (de Freitas 2016).
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species tends to live alone and close to burrow systems. It inhibits large sandy loam soil in prairie with herbaceous plants (Bidau 2015). It is often found in sand dunes and edges of rivers (Bidau and Ojeda pers. comm).
Systems:Terrestrial

Threats [top]

Major Threat(s): This species has a naturally restricted range. Its numbers have been declining for a long time and it is listed as CR in the Red List of Argentina (Ojeda and Bidau pers. comm). A threat to this species is overgrazing (Bidau 2015).

Conservation Actions [top]

Conservation Actions: There is no information available about any conservation measures being made to protect this species. Further research is necessary to clarify the true status of this species.

Citation: Bidau, C.J. 2018. Ctenomys roigi. The IUCN Red List of Threatened Species 2018: e.T136633A22193077. . Downloaded on 15 October 2018.
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