Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Cycadopsida Cycadales Zamiaceae

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.
Previously published Red List assessments:
2003 Critically Endangered (CR)
1998 Vulnerable (V)

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.
Countries occurrence:
Mexico (Chiapas, Oaxaca)
Number of Locations: 3
Lower elevation limit (metres): 800
Upper elevation limit (metres): 1600
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.
Current Population Trend: Decreasing
Additional data:
Number of mature individuals: 2000
Population severely fragmented: No

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
Generation Length (years): 45

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 2010: e.T42102A10645100. . Downloaded on 13 October 2015.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided