|Scientific Name:||Strombocactus disciformis (DC.) Britton & Rose|
Mammillaria disciformis DC.
|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:||Two subspecies are recognized, the nominate form and subsp. esperanzae Glass & S. Arias.|
|Red List Category & Criteria:||Vulnerable B1ab(v) ver 3.1|
|Assessor(s):||Gómez-Hinostrosa, C., Sánchez , E., Guadalupe Martínez, J. & Bárcenas Luna, R.|
|Reviewer(s):||Superina, M., Goettsch, B.K. & Chanson, J.S.|
Strombocactus disciformis is considered to be Vulnerable because of its limited range (extent of occurrence approximately 4,500 km2), it occurs in less than 10 locations, and is experiencing a decline in mature individuals due to illegal overcollection.
|Previously published Red List assessments:|
|Range Description:||The species occurs in Mexico in the states of Guanajuato, Hidalgo and Querétaro (Hernández et al. 2004).|
Native:Mexico (Guanajuato, Hidalgo, Querétaro)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is relatively abundant in canyon habitats. There are 19 known localities.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||The species is reported in matorral on steep, calcareous, mudrock (lutita) alluvial cliffs along stream beds or canyon walls (Lüthy 2001).|
|Use and Trade:||This cactus is found in the Mexican trade of ornamental plants (Bárcenas 2003).|
|Major Threat(s):||Illegal collection for the ornamental plant trade is an increasing threat.|
The 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 the category “threatened” (A; SEMARNAT 2010). It occurs in a protected area.
An important step for the conservation of the species is commercial propagation to reduce the collection from wild populations. A micropropagation technique has been established at the Cadereyta Regional Botanic Gardens with a rate of 10x/4 weeks, with 85% soil adaptation success (E. Sánchez pers. comm. 2011).
The species is included in CITES Appendix I.
|Amended reason:||The species distribution map has been included.|
|Citation:||Gómez-Hinostrosa, C., Sánchez , E., Guadalupe Martínez, J. & Bárcenas Luna, R. 2017. Strombocactus disciformis (amended version of 2013 assessment). The IUCN Red List of Threatened Species 2017: e.T152318A121587897.Downloaded on 21 April 2018.|
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