Dioon califanoi

De Luca & Sabato

Plante

ENLR Monde (IUCN)

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

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Calcul du tissu écologique de Dioon califanoi.

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

Liste rouge IUCN

EN · En dangercritères A2cd; B1ab(i,ii,iii,v)↘Décroissante

Évaluation complète

Évaluation: 2022 · v3.1
Altitude: 1800 – 3250 m
Profondeur: – m

État de la populationTexte officiel évaluation IUCNExpert

The species is known from two localities (one with 2,500 and the other with 500 mature individuals), with both subpopulations experiencing ongoing declines. The past declines are estimated to exceed 50% over the past 50 years, which is less than three generations for these slow recruiting species.

Menaces identifiées(3 menaces classées CMP-IUCN)

2_3_2
Small-holder grazing, ranching or farming
Ongoing
4_1
Roads & railroads
Ongoing
5_2_1
Intentional use (species is the target)
Ongoing

Description complète des menacesTexte détaillé évaluation IUCNExpert

Individuals are threatened by habitat destruction as a result of cattle grazing and road-building, and also due to over-collecting.

Habitats préférentiels (classification IUCN)

1_9Forest - Subtropical/Tropical Moist Montane
6Rocky areas (eg. inland cliffs, mountain peaks)

Mesures de conservation recommandéesStratégies de conservation IUCNExpert

This species is listed in Appendix II of CITES. Subpopulations occur in the Tehuacán–Cuicatlán Biosphere Reserve. An education and awareness programme as well as the monitoring of populations will support the conservation of this species

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

4_3Awareness & communications

Stress écologiques (5)Stresses Classification — IUCNExpert

1_1Ecosystem conversion
1_1Ecosystem conversion
1_2Ecosystem degradation
1_2Ecosystem degradation
2_1Species mortality

Usage & commerce (1)Use & Trade — IUCNExpert

13Pets/display animals, horticulture
internationalnational

Priorités de recherche (3)Research Needed Classification — IUCNExpert

1_2Population size, distribution & trends
1_3Life history & ecology
1_6Actions

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

Royaumes biogéographiques

Neotropical

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

CycadTree - large

Références bibliographiques (7)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).
Donaldson, J.S. (ed.). 2003. Cycads. Status Survey and Conservation Action Plan. IUCN/SSC Cycad Specialist Group. IUCN, Gland, Switzerland and Cambridge, UK.
Whitelock, L.M. 2002. The Cycads. Timber Press, Portland, Oregon.
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>.
Jones, D.L. 1993. Cycads of the World. Reed, New Holland, Frenchs Forest, N.S.W., Australia.
De Luca, P. and Sabato, S. 1979. Dioon califanoi (Zamiaceae), a new species from Mexico. Brittonia 31(1): 170-173.

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

assessor

Chemnick, J. & Gregory, T.

contributor

Morales, S. & Donaldson, J.S.

evaluator

Bösenberg, J.D.

⚠ 1 erratum publié après l'évaluation.

Chemnick, J. & Gregory, T. 2022. Dioon califanoi (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T42145A243385361. Accessed on 05 May 2026.