Dioon tomasellii

De Luca, Sabato & Vázq.Torres

Plante

VULR Monde (IUCN)

1 photo · Licences CC (Wikimedia Commons / iNaturalist)Click pour agrandir

Filtrer le graphe par contexte spatialPays · région · aire protégée · écorégion · biome

Graphe en cours d’indexation

Calcul du tissu écologique de Dioon tomasellii.

Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).

Liste rouge IUCN

VU · Vulnérablecritères A2cd↘Décroissante

Évaluation complète

Évaluation: 2022 · v3.1
Altitude: 600 – 1900 m
Profondeur: – m

État de la populationTexte officiel évaluation IUCNExpert

The population size of this species is not available but previous estimates of 6,000 plants in the wild included those subpopulations that now belong to Dioon stevensonii. Reducing this previous estimate by the upper value in the population estimate for D. stevensonii, a population size of 4,500 plants in the wild is suggested for D. tomasellii.

Menaces identifiées(2 menaces classées CMP-IUCN)

2_1_4
Scale Unknown/Unrecorded
Ongoing
5_2_1
Intentional use (species is the target)
Ongoing

Description complète des menacesTexte détaillé évaluation IUCNExpert

This species is threatened by habitat loss due to agricultural expansion and over-collection for the ornamental trade.

Habitats préférentiels (classification IUCN)

1_5Forest - Subtropical/Tropical Dry

Mesures de conservation recommandéesStratégies de conservation IUCNExpert

This species is listed in Appendix II of CITES. Subpopulations more than likely occur within the Sierra de Quila Flora and Fauna Protection Area. An education and awareness programme as well as the long-term monitoring of subpopulations will support the conservation of this species.

Actions de conservation (1)Conservation Actions Classification Scheme — IUCNExpert

4_3Awareness & communications

Stress écologiques (3)Stresses Classification — IUCNExpert

1_1Ecosystem conversion
1_2Ecosystem degradation
2_1Species mortality

Usage & commerce (1)Use & Trade — IUCNExpert

13Pets/display animals, horticulture
internationalnational

Priorités de recherche (1)Research Needed Classification — IUCNExpert

1_2Population size, distribution & trends

Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert

Royaumes biogéographiques

Neotropical

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

CycadTree - small

Références bibliographiques (10)Sources scientifiques de l'évaluation IUCNExpert

IUCN. 2023. The IUCN Red List of Threatened Species. Version 2023-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 07 December 2023).
IUCN. 2022. The IUCN Red List of Threatened Species. Version 2022-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 21 July 2022).
Hernández-Tapia, J.E., Jiménez-Ramírez, J. and Vovides, A.P. 2020. Taxonomic revision of the genus Dioon (Zamiaceae). Phytotaxa 442(4): 267-290.
Gutiérrez-Ortega, J.S., Salinas-Rodríguez, M.M., Martínez, J.F., Molina-Freaner, F., Pérez-Farrera, M.A., Vovides, A.P., Matsuki, Y., Suyama, Y., Ohsawa, T.A., Watano, Y. and Kajita, T. 2018. The phylogeography of the cycad genus Dioon (Zamiaceae) clarifies its Cenozoic expansion and diversification in the Mexican transition zone. Annals of Botany 121: 535-548.
Nicolalde-Morejón, F., Vergara-Silva, F., González-Astorga, J., Vovides, A.P. and De Los Monteros, A.E. 2009. Reciprocal illumination of morphological characters upon a molecular hypothesis supports the proposal of a new species of cycad from Mexico. Systematics and Biodiversity 7(1): 73-79.
Whitelock, L.M. 2002. The Cycads. Timber Press, Portland, Oregon.
Jones, D.L. 2002. Cycads of the World (2nd edition). Smithsonian Institute Press, Washington, DC.
Hill, K.D. and Stevenson, D.W. 1998-2006. The Cycad Pages. Available at: <a href="http://plantnet.rbgsyd.gov.au/PlantNet/cycad/">http://plantnet.rbgsyd.gov.au/PlantNet/cycad/</a>.
Chemnick, J., Gregory, T.J. and Salas-Morales, S.H. 1998. A revision of Dioon tomasellii (Zamiaceae) from western Mexico, a range extension of D. merolae, and clarification of D. purpusii. Phytologia 83(1): 1-6.
De Luca, P., Sabato, S. and Vazquez Torres, M. 1984. Dion tomasellii (Zamiaceae), a new species with two varieties from Western Mexico. Brittonia 36(3): 223-227.

Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert

assessor

Bösenberg, J.D.

contributor

Vovides, A.P., Chemnick, J., Gregory, T. & Morales, S.

evaluator

Donaldson, J.S.

⚠ 1 erratum publié après l'évaluation.

Bösenberg, J.D. 2022. Dioon tomasellii (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T179414474A243388110. Accessed on 05 May 2026.