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

Aleurodiscus stratosus Gorjón, Gresl. & Rajchenb.

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Scientific name
Aleurodiscus stratosus
Author
Gorjón, Gresl. & Rajchenb.
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Russulales
Family
Stereaceae
Assessment status
Under Assessment
Proposed by
Alina Greslebin
Comments etc.
Anders Dahlberg, Alina Greslebin

Assessment Notes

Taxonomic notes

A characteristical species by the cupuliform creamish basidiome growing specifically on bark of living Saxegothaea conspicua. Microscopically it is characterized by the stratose hymenial configuration, acanthobasidia, acanthophyses, gloeocystidia and globose and verrucose basidiospores (Gorjón & al. 2013).


Why suggested for a Global Red List Assessment?

Aleurodiscus stratosus is a very rare corticioid fungi living on bark of Saxegothaea conspicua only known from the temperate zone of Argentina. The ongoing decline of its host tree of in combination with its fragmentation and rareness, considering undiscovered sites, and the only know location of this species despite the intensive search in its host, results in it being assessed as Endangered (EN) under the criteria:
B2ab(v) EN: this criterium applies because area of occupancy estimated to be less than 500 km2, Severely fragmented or known to exist at no more than five location
D EN: this criterium is applied on the basis of population size estimated to number fewer than 250 mature individuals.

Host presents a decreasing population trend frequently altered by the action of man. Not found in surveys in neighboring Chilean forests (Gorjón & Hallenberg 2012).


Geographic range

Known only from one locality:
Argentina, Neuquén, Nahuel Huapi National Park, Puerto Blest. It has been searched for but not found in Chile (Gorjón & Hallenberg 2012).


Population and Trends

Population trend: unknown. The species is known from one location.
Presumably decreasing

Population Trend: Uncertain


Habitat and Ecology

Growing on bark of living Saxegothaea conspicua.

Temperate Forest

Threats

The host, Saxegothaea conspicua is restricted in distribution and confined to national parks in Argentina. In Chile conversion of native forest in the Coastal Cordillera to commercial plantations of Pinus radiata and Eucalyptus, means that much of the habitat for this species has been lost and continues to disappear.

Unintentional effects: subsistence/small scale (species being assessed is not the target) [harvest]Recreational activitiesIncrease in fire frequency/intensity

Conservation Actions

It is neccesary to protect the only known host of this species and it habitat.

Site/area protectionResource & habitat protection

Research needed

Geographic presence needs to be assessed, especially in Chile.
Knowledge on factors affecting its limited distribution within the host range are highly desirable.
Taxonomy, Population size, distribution & trends

Population size, distribution & trends

Use and Trade


Bibliography

Gorjón S.P., Greslebin A.G., Rajchenberg M. 2013. The genus Aleurodiscus s.l. (Stereaceae, Russulales) in the Patagonian Andes. Mycological Progress 12:91-108.
Gorjón S.P., Hallenberg N. 2012. Some new species and a first checklist of corticioid fungi (Basidiomycota) from Chile. Mycol. Progress 12:185-192.


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted