Ceratozamia norstogii


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Ceratozamia norstogii
Species Authority: D.W.Stev.

Assessment Information [top]

Red List Category & Criteria: Endangered A2abd; B1ab(iii,iv,v); C1 ver 3.1
Year Published: 2010
Date Assessed: 2009-10-31
Assessor(s): Vovides, A., Chemnick, J. & Gregory, T.
Reviewer(s): Donaldson, J.S. & Bösenberg, J.D.
Originally heavily impacted by collecting, with an estimated decline of 50% over the past 30 years (one generation) but this seems to have slowed considerably. New data indicates that the species has an extent of occurrence of 1,100 km² and occurs at three localities, which means it qualifies as Endangered under criterion B. The population size is estimated to be 2,000 plants so, with decline of 50% over less than two generations, it qualifies under criterion C1.
2003 Critically Endangered (IUCN 2003)
2003 Critically Endangered
1997 Vulnerable (Walter and Gillett 1998)

Geographic Range [top]

Range Description: This species is a narrow endemic in Chiapas and Oaxaca states in Mexico. Plants are found on the Sierra Madre de Chiapas.
Mexico (Chiapas, Oaxaca)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Current population data suggest that there are in excess of 2,000 plants at the one population. There are a further two populations.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: Plants occur in seasonally dry pine-oak forests in the Sierra Madre de Chiapas (Sierra de Soconusco)
Systems: Terrestrial

Threats [top]

Major Threat(s): The species was heavily impacted by collectors for the ornamental trade, but this has slowed in recent years.

Conservation Actions [top]

Conservation Actions: This species is listed on Appendix I of the CITES Appendices. Plants occur in the El Triunfo Biosphere Reserve and /or the La Sepultura Biosphere Reserve.

Citation: Vovides, A., Chemnick, J. & Gregory, T. 2010. Ceratozamia norstogii. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 31 March 2015.
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