• Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Amanita merxmuelleri Bresinsky & Garrido

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Scientific name
Amanita merxmuelleri
Bresinsky & Garrido
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Proposed by
Camille Truong
Comments etc.
Camille Truong

Assessment Notes

Taxonomic notes

Why suggested for a Global Red List Assessment?

This emblematic ectomycorrhizal species strictly associates with Nothofagus hosts in Patagonian forests (Chile and Argentina).

Geographic range

The distribution of Amanita merxmuelleri is scattered on the western and southern side of the Andes, along the whole distribution range of Nothofagus. In Chile, it was collected from the region VII (Maule) to XV (Magallanes), while in Argentina it only occurs in Tierra del Fuego.

Population and Trends

Although populations are scattered and usually not abundantly fruiting, Amanita merxmuelleri is found over a very broad area in Patagonia, with the capacity to associate with multiple Nothofagus species.

Population Trend: Stable

Habitat and Ecology

This ectomycorrhizal species associates exclusively with Nothofagus species in Patagonia. It was found with multiple Nothofagus hosts, such as N. dombeyi, N. pumilio and N. obliqua. It has a wide distribution along te Andes from latitudes 35º to 55º. Its only ecological restrictions seem to be linked with sites that are relatively oceanic, since in Argentina it is only found South of the Andes in Tierra del Fuego.

Subantarctic ForestTemperate Forest


This species is associated with an increasingly threatened Nothofagus forest. Deforestation, particularly in the Northern range of its distribution, and forest fires (intentional and accidental due to drought and climate change) are a growing threat.

Increase in fire frequency/intensityHabitat shifting & alteration

Conservation Actions

In Chile, several known populations lies within protected areas at the regional or national level (Karukinka Reserve, Magallanes Nacional Reserve, Puyehue National Park, Los Ruiles Nacional Reserve, Nahuelbuta National Park, Rucamanque Reserve).

Site/area protection

Research needed

Further research is needed to understand the biology of the species (fruiting patterns) as well as its ecology (habitat requirement, host specificity and interactions). Although the species has a wide distribution with multiple Nothofagus hosts, its population trends are currently unknown.

Population size, distribution & trendsLife history & ecology

Use and Trade

In Chile, the species is collected and locally consumed by mapuche and rural communities in the BioBio region to the South (Salazar Vidal 2016).

Food - human


Comité clasificacíon de especies silvestres (2014) Ministerio de Medioambiente, Gobierno de Chile. http://www.mma.gob.cl/clasificacionespecies/ficha11proceso/FichasPAC_11RCE/Amanita_merxmuelleri_11RCE_02_PAC.pdf

Garrido N, Bresinsky A (1985) Amanita merxmuelleri (Agaricales), eine neue Art aus Nothofagus-Wäldern Chiles. Bot. Jahrb. Syst. 107: 521-540.

Garrido N (1988) Agaricales s.l. und ihre Mykorrizen in den Nothofagus-Wäldern Mittelchiles. Bibliotheca Mycologica 120, J. Cramer, Berlin,
Stuttgart. ISBN 3-443-59021-7.

Salazar Vidal VE (2016) Amanita diemii Singer y Amanita merxmellueri Bresinsky & Garrido (Agaricales, Basidiomycota), las amanitas comestibles de Chile. Bol. Micol. 31: 28–35.

Truong C, Sánchez-Ramírez S, Kuhar F, Kaplan Z, Smith ME (2017) The Gondwanan connection – Southern temperate Amanita lineages and the description of the first sequestrate species from the Americas. Fungal Biology 121: 638–651. https://doi.org/https://doi.org/10.1016/j.funbio.2017.04.006

Valenzuela E (1993) Estudio sistemático, corológico y ecológico de los Agaricales sensu lato de los bosques autóctonos de la Región de Los Lagos en Chile. Tesis de Doctorado, Universidad Alcalá de Henares, España.

Known distribution - countries

Regional Population and Trends

Country Trend Redlisted