|Scientific Name:||Mammillaria nana Backeb. ex Mottram|
|Taxonomic Source(s):||Hunt, D., Taylor, N. and Charles, G. (compilers and editors). 2006. The New Cactus Lexicon. dh Books, Milborne Port, UK.|
|Taxonomic Notes:||Considered a synonym of M. crinita by cactus specialist Anderson (2001) and by the assessors (Fitz Maurice 2002). Accepted as a valid species by cactus specialists, Hunt (1999), provisionally, and Pilbeam (1999).|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor(s):||Fitz Maurice, B, Guadalupe Martínez, J., Sánchez , E. & Fitz Maurice, W.A.|
|Reviewer(s):||Superina, M. & Goettsch, B.K.|
Mammillaria nana qualifies as Least Concern due to its extensive subpopulations over a large area, where little decline from human activities is in current evidence.
|Previously published Red List assessments:|
|Range Description:||This species is endemic to Mexico, where it occurs in the states of Guanajuato, Querétaro and San Luis Potosí at elevations of 1,600 to 1,800 m asl. The species appears over an area of 18,000 km2.|
Native:Mexico (Guanajuato, Querétaro, San Luis Potosí)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is common with an estimated population size of more than 100,000 individuals.|
|Current Population Trend:||Stable|
|Habitat and Ecology:||This species is found on volcanic soil in xerophyllous scrub.|
|Use and Trade:||This species is occasionally collected for use as an ornamental. It is in commercial cultivation for the international trade.|
There is little interest in collecting so this represents only a small threat. Increased agricultural use and housing expansion within its habitat also pose a small threat. Temperature extremes such as the 100 year freeze on the Altiplano in December 1997 present a serious but unpredictable threat.
This species is found in multiple protected areas.
This species is legally protected in Mexico by the national list of species at risk of extinction, NOM-059-SEMARNAT-2010, where it is listed under category “subject to special protection” (Pr; SEMARNAT 2010).
|Amended reason:||The species distribution map has been added.|
|Citation:||Fitz Maurice, B, Guadalupe Martínez, J., Sánchez , E. & Fitz Maurice, W.A. 2017. Mammillaria nana (amended version of 2013 assessment). The IUCN Red List of Threatened Species 2017: e.T152728A121546436.Downloaded on 21 August 2018.|
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