|Scientific Name:||Ceratozamia zaragozae|
|Red List Category & Criteria:||Critically Endangered A2acd; B1ab(iii,iv,v)+2ab(iii,iv,v); C1 ver 3.1|
|Assessor(s):||Chemnick, J & Gregory, T.|
|Reviewer(s):||Donaldson, J.S. & Bösenberg, J.D.|
Qualifies for Critically Endangered based on extent of decline (95%) over the past 50 years, occurrence in a single location with a small extent of occurrence (45 km²) and area of occupancy (<10 km²) and small population size.
|Previously published Red List assessments:|
|Range Description:||This species is endemic to San Luis Potosí state, Mexico. Plants are found SW of Rio Verde, in the Capulin district.|
Native:Mexico (San Luis Potosí)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Plants are only known from the type locality, at which there are less than 50 plants.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||Plants grow in the Sierra de la Equiteria, in dry pine-oak forests on volcanic outcrops and in rhyolitic soils.|
|Generation Length (years):||45|
|Major Threat(s):||Plants have been severely affected by over-collection, to the point of being almost eradicated in certain areas.|
|Conservation Actions:||This species is listed on Appendix I of the CITES Appendices.|
Chemnick, J., Gregory, T. and Morales, S. 2007. Email received in response to request for information.
Donaldson, J.S. 2006. Notes.
Donaldson, J.S. (ed.). 2003. Cycads. Status Survey and Conservation Action Plan. IUCN/SSC Cycad Specialist Group. IUCN, Gland, Switzerland and Cambridge, UK.
Hill, K.D. and Stevenson, D.W. 1998-2006. The Cycad Pages. Available at: http://plantnet.rbgsyd.gov.au/PlantNet/cycad/.
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
Jones, D.L. 1993. Cycads of the World. Reed, New Holland, Frenchs Forest, N.S.W., Australia.
Whitelock, L.M. 2002. The Cycads. Timber Press, Portland, Oregon.
|Citation:||Chemnick, J & Gregory, T. 2010. Ceratozamia zaragozae. The IUCN Red List of Threatened Species 2010: e.T42103A10645793.Downloaded on 27 July 2017.|
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