Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Cycadopsida Cycadales Zamiaceae

Scientific Name: Ceratozamia whitelockiana
Species Authority: J.Chemnick & T.J.Gregory

Assessment Information [top]

Red List Category & Criteria: Endangered A2c; B1ab(i,ii,iii,v)+2ab(i,ii,iii,v); C1 ver 3.1
Year Published: 2010
Date Assessed: 2009-10-31
Assessor(s): Vovides, A. & Chemnick, J.
Reviewer(s): Donaldson, J.S. & Bösenberg, J.D.
Qualifies as Endangered based on estimated decline of 70% over the past 50 years (<2 generations) as well as under criterion B due to small extent of occurrence and occurrence at only two locations, and criterion C1 due to small population size (2,200-2,500 mature individuals).
Previously published Red List assessments:
2003 Endangered (EN)

Geographic Range [top]

Range Description: This species is a narrow endemic in Oaxaca state, Mexico. The distribution is restricted to the catchment of the Rio Valle Nacional in the vicinity of Metates. Plants are also found in the Chiapan district.
Countries occurrence:
Mexico (Oaxaca)
Number of Locations: 2
Lower elevation limit (metres): 335
Upper elevation limit (metres): 970
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Plants are known from two localities. The one population has approximately 2,000 plants and the other has 200 plants.
Current Population Trend: Decreasing
Additional data:
Number of mature individuals: 2200-2500
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: Plants occurs on steep slopes in evergreen cloud forests in the Rio Valle Nacional.
Systems: Terrestrial
Generation Length (years): 45

Threats [top]

Major Threat(s): This species is affected by habitat destruction due to slash and burn activities. The habitat is being replaced by coffee and banana plantations.

Conservation Actions [top]

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

Citation: Vovides, A. & Chemnick, J. 2010. Ceratozamia whitelockiana. The IUCN Red List of Threatened Species 2010: e.T42128A10660104. . Downloaded on 06 October 2015.
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