|Scientific Name:||Mammillaria hahniana Werderm.|
|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:||Includes numerous variations and described subspecies. none of which are currently accepted.|
|Red List Category & Criteria:||Near Threatened ver 3.1|
|Assessor(s):||Bárcenas Luna, R., Gómez-Hinostrosa, C., Guadalupe Martínez, J. & Sánchez , E.|
|Reviewer(s):||Superina, M., Goettsch, B.K. & Schipper, J.|
Mammillaria hahniana is listed as Near Threatened due to is very limited range (extent of occurrence ca 1,000 km2), it is known from two locations, and because it is affected by illegal collection and some subpopulations are impacted by deforestation. However, it is currently not declining at a rate sufficient to qualify for Vulnerable (B1ab). The majority of the species occurs in a protected area/biosphere reserve which gives some safeguard, however the species is in decline outside of these areas.
|Previously published Red List assessments:|
|Range Description:||This species is endemic to Mexico, where it is distributed in the states of Guanajuato and Querétaro (Hernández et al. 2004) and into San Luis Potosí (Pilbeam 1999). It occurs at elevations of 750 to 2,200 m asl (Pilbeam 1999). It is very likely for the species to be found in Hidalgo (E. Sánchez pers. comm. 2011).|
Native:Mexico (Guanajuato, Querétaro, San Luis Potosí)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This cactus is locally common where it occurs, and grows in groups/clusters which are generally rare.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||The species occurs along relatively steep slopes in submontane matorral and deciduous forests.|
|Use and Trade:||This cactus is used as an ornamental, and its fruit are eaten by humans.|
|Major Threat(s):||The main threats to this species are illegal collection for its use as an ornamental, and deforestation that impacts some subpopulations.|
The majority of the range of the species is in protected areas.
This species is reproduced by seed and micropropagation at Querétaro Botanical Gardens. The in vitro reproduction has a rate of 5x/4 weeks, with 99% soil adaptation success (E. Sánchez pers. comm. 2011).
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 “threatened” (A; SEMARNAT 2010).
|Amended reason:||The species distribution map has been added.|
|Citation:||Bárcenas Luna, R., Gómez-Hinostrosa, C., Guadalupe Martínez, J. & Sánchez , E. 2017. Mammillaria hahniana (amended version of 2013 assessment). The IUCN Red List of Threatened Species 2017: e.T151925A121513859.Downloaded on 17 January 2018.|
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