|Scientific Name:||Dioon spinulosum|
|Species Authority:||Dyer ex Eichl.|
|Red List Category & Criteria:||Endangered A2acd ver 3.1|
|Assessor(s):||Vovides, A. Chemnick, J. & Gregory, T.|
|Reviewer(s):||Donaldson, J.S. & Bösenberg, J.D.|
Data from known populations indicates a decline of between 50% and 90% in different subpopulations, with an estimated overall decline of 70% over the past 2 generations, which results a status of EN (criterion A)
|Previously published Red List assessments:||
|Range Description:||This species occurs in the Oaxaca and Veracruz states of Mexico. They are found near the towns of Ciudad Aleman, Tuxtepec and Ojitlan, on the lowlands and hills at the foot of the Sierra de Oaxaca.|
Native:Mexico (Oaxaca, Veracruz)
|Number of Locations:||3|
|Lower elevation limit (metres):||20|
|Upper elevation limit (metres):||300|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species occurs in at least three locations|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||This species is found growing in lowland tropical evergreen rainforest on limestone hills and cliffs.|
|Generation Length (years):||500|
|Major Threat(s):||This species is affected by severe habitat destruction as a result of farming, ranching and creation of reservoirs. There has been severe over-collection in the past.|
|Conservation Actions:||This species is listed on Appendix II of the CITES Appendices. Plants are protected by local communities.|
Chemnick, J., Gregory, T. and Morales, S. 2007. Email received in response to request for information.
Hill, K.D. and Stevenson, D.W. 1998-2006. The Cycad Pages. Available at: http://plantnet.rbgsyd.gov.au/PlantNet/cycad/.
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
Tang, W. 1997. Focus on Dioon spinulosum. Encephalartos 50: 4-11.
Various researchers. 2002. Notes From John Donaldson - File.
Whitelock, L.M. 2002. The Cycads. Timber Press, Portland, Oregon.
|Citation:||Vovides, A. Chemnick, J. & Gregory, T. 2010. Dioon spinulosum. The IUCN Red List of Threatened Species 2010: e.T42149A10667709. http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T42149A10667709.en . Downloaded on 10 October 2015.|