|Scientific Name:||Mammillaria albicoma|
|Taxonomic Notes:||Recognized by Bravo (1991), Hunt (1999), Gómez-Hinostrosa and Hernández (2000), and Hernández et al. (2001) as a good species.|
|Red List Category & Criteria:||Endangered B1ab(iii,v)+2ab(iii,v) ver 3.1|
|Assessor(s):||Gómez-Hinostrosa, C., Hernández, H.M., Goettsch, B.K., Sotomayor, M. & Smith, M.|
|Reviewer(s):||Superina, M., Goettsch, B.K. & Chanson, J.S.|
Mammillaria albicoma is listed as Endangered under criterion B because of its restricted range (extent of occurrence ca 2,144 km², and area of occupancy less than 500 km²). It is known from seven locations, and the population is severely fragmented. The species is not abundant and it is under pressure due to illegal collection and habitat destruction, which is causing a continuing decline in the population and the number of mature individuals.
|Range Description:||This cactus grows in northern San Luis Potosí, Nuevo León and Tamaulipas, Mexico. The extent of occurrence for this species is 2,144 km², and its range is divided into two separate subpopulations with an estimated area of occupancy of less than 500 km². It is known from seven locations.|
Native:Mexico (Nuevo León, San Luis Potosí, Tamaulipas)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This is not a common species, it is highly localized and usually only a few plants occur in each place. The population is severely fragmented.|
|Habitat and Ecology:||Mammillaria albicoma is usually found on limestone slopes with Agave lecheguilla-Hechtia glomerata scrub.|
|Use and Trade:||The species is grown as an ornamental. Plants are also collected by locals and sold in markets at Christmas time to decorate nativity scenes.|
|Major Threat(s):||The main threats for Mammillaria albicoma are habitat destruction mostly by goat over-pasturing, illegal collection, and collection of plants to use them in decorating nativity scenes.|
One of the subpopulations (40% of the known localities) of this species is within a recently decreed protected area, Area Natural Protegida del Real de Guadalcázar (Hernández et al. 2001). The effective conservation of this area would ensure the survival of the species. 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).
|Citation:||Gómez-Hinostrosa, C., Hernández, H.M., Goettsch, B.K., Sotomayor, M. & Smith, M. 2013. Mammillaria albicoma. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 31 October 2014.|
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