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Ceratozamia zaragozae

Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_onStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA CYCADOPSIDA CYCADALES ZAMIACEAE

Scientific Name: Ceratozamia zaragozae
Species Authority: Medellín-Leal

Assessment Information [top]

Red List Category & Criteria: Critically Endangered A2acd; B1ab(iii,iv,v)+2ab(iii,iv,v); C1 ver 3.1
Year Published: 2010
Date Assessed: 2009-10-31
Assessor/s: Chemnick, J & Gregory, T.
Reviewer/s: Donaldson, J.S. & Bösenberg, J.D.
Justification:
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.
History:
2003 Critically Endangered (IUCN 2003)
2003 Critically Endangered
1997 Endangered (Walter and Gillett 1998)

Geographic Range [top]

Range Description: This species is endemic to San Luis Potosí state, Mexico. Plants are found SW of Rio Verde, in the Capulin district.
Countries:
Native:
Mexico (San Luis Potosí)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Plants are only known from the type locality, at which there are less than 50 plants.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: Plants grow in the Sierra de la Equiteria, in dry pine-oak forests on volcanic outcrops and in rhyolitic soils.
Systems: Terrestrial

Threats [top]

Major Threat(s): Plants have been severely affected by over-collection, to the point of being almost eradicated in certain areas.

Conservation Actions [top]

Conservation Actions: This species is listed on Appendix I of the CITES Appendices.

Bibliography [top]

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. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 20 April 2014.
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