| Kingdom | Phylum | Class | Order | Family |
|---|---|---|---|---|
| PLANTAE | TRACHEOPHYTA | CYCADOPSIDA | CYCADALES | ZAMIACEAE |
| Scientific Name: | Dioon califanoi |
| Species Authority: | De Luca & Sabato |
| Red List Category & Criteria: | Endangered A4c;B1ab(i,ii,iv)+2ab(i,ii,iv) ver 3.1 | ||||||
| Year Published: | 2010 | ||||||
| Assessor/s: | Chemnick, J. & Gregory, T. | ||||||
| Reviewer/s: | Donaldson, J.S. & Bösenberg, J.D. | ||||||
|
Justification: Qualifies as Endangered based on an observed decline of ca. 50% over the past 50 years and an expected ongoing decline of 25% over the next generation. Also has a very restricted extent of occurrence (126 km²), which is almost within the range for Critically Endangered. |
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| History: |
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| Range Description: | This species is endemic to Mexico (Oaxaca and Puebla states). They are found near Teotitlan del Camino and Huautla de Jimenez. |
| Countries: |
Native:
Mexico (Oaxaca, Puebla)
|
| Range Map: | Click here to open the map viewer and explore range. |
| Population: | The species is known from two localities (2,500 and 500 plants), with both subpopulations experiencing ongoing decline. |
| Population Trend: |
Decreasing
|
| Habitat and Ecology: | The plants grow on steep shady slopes in tropical, deciduous forest. They are found in the transition zone between oak/pine forest and deciduous tropical thorn forest. The soil is generally rocky and poor. |
| Systems: | Terrestrial |
| Major Threat(s): | The plants are threatened by habitat destruction as a result of cattle grazing and road-building and also due to over-collecting. |
| Conservation Actions: | This species is listed on Appendix II of the CITES Appendices. |
| Citation: | Chemnick, J. & Gregory, T. 2010. Dioon califanoi. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 26 May 2012. |
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