Toothed-cone Cycad
Encephalartos pterogonusR.A.Dyer & I.Verd.
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Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Encephalartos pterogonus.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
CR · En danger critiquecritères B1ab(ii,iii,v)↘Décroissante- Évaluation
- 2022 · v3.1
- Altitude
- 700 – 1000 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
Population size was originally estimated to be ten mature individuals based on information from collectors. Although several collectors in South Africa claim that the species is extinct in the wild, Capela (2006) states that there are at least 246 mature plants, 112 smaller plants and 300-400 seedlings that survived out of the initial 1,000 seedlings that were re-introduced. Another subpopulation on a nearby inselberg may also belong to Encephalartos pterogonus, so further surveying is required to get a more accurate total estimate of the population size.
Menaces identifiées(2 menaces classées CMP-IUCN)
5_2_1Intentional use (species is the target)Rapid DeclinesMajority (50-90%)Ongoing2_1_1Shifting agricultureUnknownMajority (50-90%)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
This species has been severely affected by over-collecting for ornamental purposes. The surrounding habitat has been affected by clearing for agriculture and harvest of wood and other products. The small range and low numbers of this species means it could be affected by reproductive failure.
Habitats préférentiels (classification IUCN)
1_5Forest - Subtropical/Tropical Dry2_1Savanna - Dry6Rocky areas (eg. inland cliffs, mountain peaks)
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix I of the CITES Appendices. This species does not occur in any formally protected area. Identification of suitable sites for the formal protection of this species is needed. An education and awareness programme as well as the long-term monitoring of the population will support the conservation of this species.
Actions de conservation (4)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection1_2Resource & habitat protection2_1Site/area management4_3Awareness & communications
Stress écologiques (4)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_2Ecosystem degradation2_1Species mortality2_3_8Other
Usage & commerce (2)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternationalnational16Establishing ex-situ production *national
Priorités de recherche (5)Research Needed Classification — IUCNExpert
1_1Taxonomy1_2Population size, distribution & trends1_3Life history & ecology1_6Actions3_1Population trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Afrotropical
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
CycadShrub - large
Références bibliographiques (5)Sources scientifiques de l'évaluation IUCNExpert
- 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).
- Capela, P. 2006. <i>Speculations on the </i>Encephalartos species<i> of Mozambique</i>. Pedro Capela, Chimoio, Mozambique.
- Jones, D.L. 2002. <i>Cycads of the World</i>. Smithsonian Institution Press, Washington, DC.
- Goode, D. 2001. <i>Cycads of Africa</i>. D & E Cycads of Africa, Gallo Manor, Johannesburg, South Africa.
- Goode, D. 1989. <i>Cycads of Africa</i>. Struik Winchester, Cape Town.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Bösenberg, J.D.
contributor
Donaldson, J.S.
evaluator
Donaldson, J.S.
Bösenberg, J.D. 2022. Encephalartos pterogonus. The IUCN Red List of Threatened Species 2022: e.T41897A51053908. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s
Consulter sur les bases externes
Observations & statuts
Cartographie