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Dioon merolae

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA CYCADOPSIDA CYCADALES ZAMIACEAE

Scientific Name: Dioon merolae
Species Authority: De Luca, Sabato & Vázq.Torres

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2c; 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 as Vulnerable based on estimated decline of 32%, small extent of occurrence and occurrence at fewer than ten locations, as well as overall population size of <10,000 mature individuals
History:
2003 Vulnerable (IUCN 2003)
2003 Vulnerable
1997 Vulnerable (Walter and Gillett 1998)

Geographic Range [top]

Range Description: This species is endemic to Chiapas and Oaxaca provinces in Mexico. Plants are known from the districts of Cintaalpa and Villa Flores and also in the Sierra de Juarez.
Countries:
Native:
Mexico (Chiapas, Oaxaca)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Plants are known from a number of locations and the decline in these different locations varies between 10% and 70% over the past two generations. Possible future decline is estimated between 10% and 50%.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: Plants occur in a forest dominated by Pinus and Quercus and also in tropical semi decidious forest with soils developed on sedimentary rocks and karst limestone. Specimens are found growing on steep sandstone cliffs, along thickly vegetated watercourses.
Systems: Terrestrial

Threats [top]

Major Threat(s): Populations are affected by over collection. In some cases the top portion of plants are cut off and sold as a table decoration.

Conservation Actions [top]

Conservation Actions: This species is listed on Appendix II of the CITES Appendices. Plants are known to be protected by local communities.

Citation: Chemnick, J. & Gregory, T. 2010. Dioon merolae. The IUCN Red List of Threatened Species. Version 2014.1. <www.iucnredlist.org>. Downloaded on 23 July 2014.
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