• Proposed
  • Under Assessment
  • Preliminary Assessed
  • VUAssessed
  • 5Published

Aleurodiscus bernicchiae Gorjón, Greslebin & Rajchenb.

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Scientific name
Aleurodiscus bernicchiae
Author
Gorjón, Greslebin & Rajchenb.
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Russulales
Family
Stereaceae
Assessment status
Assessed
Preliminary Category
VU B2ab(ii,iii,v); C2a(i)
Proposed by
Mario Rajchenberg
Assessors
Mario Rajchenberg
Reviewers
Anders Dahlberg

Assessment Status Notes

Taxonomic notes

A characteristical species by a cupuliform basidiome with cream to brownish colors. Microscopically it is characterized by subglobose ornamented basidiospores and above all by encrusted cystidia. This kind of encrusted cystidia is an earlier unknown feature within Aleurodiscus s.l. (Gorjón et al. 2013).


Why suggested for a Global Red List Assessment?

A corticioid basidiomycetous wood-inhabiting fungus. It is usually found on Fitzroya cupressoides (EN) and Pilgerodendron uviferum (VU), and rarely also on Saxegothaea conspicua (NT). For F. cupressoides there has been an estimated reduction in the quality of habitat across its total range and over-exploitation; also anthropogenic disturbances linked with cattle ranching and browsing. For P. uviferum there is a reduction in population trend due to over-exploitation, illegal harvesting and fire. The overall conservation of the three species is of concern due to either the reasons given above and/or small populations. In the Argentinian distributional area the 3 species are presently effectively protected within national parks, though their present geographical extension is small [data needed here?].
Not found in surveys in neighboring Chilean forests (Gorjón & Hallenberg 2012).

Criteria:
B2ab(iii) VU: this criterium applies because populations of the three host species are small and fragmented, with an area of occupancy less than 500 km2.
D1 VU: this criterium applies on the basis of an inferred population with less than 1000 individuals + low number of locations


Geographic range

Known from only two localities (see map):
Argentina, Río Negro-Neuquén, Nahuel Huapi National Park, Puerto Blest
Argentina, Chubut, Lago Puelo National Park, Motoco
It has been searched for but not found in Chile (Gorjón & Hallenberg 2012).


Population and Trends

Population trend: unknown. The species is known from 9 specimens (7 from the type locality). Hosts present a decreasing population trend, specially in Chile, but fire is a serious concern for Argentinean population (cfr. recent summer wildfires that reached very near to Los Alerces national park in Argentina).

Population Trend: Deteriorating


Habitat and Ecology

Growing on bark of low branches of the conifers Fitzroya cupressoides, Pilgerodendron uviferum, and Saxegothaea conspicua

Subantarctic Forest

Threats

Small population of its hosts due to timber harvesting, fire and/or reduction of habitat quality.

Unintentional effects: subsistence/small scale (species being assessed is not the target) [harvest]Human intrusions & disturbanceIncrease in fire frequency/intensity

Conservation Actions

Hosts protection.

Resource & 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.

TaxonomyPopulation size, distribution & trends

Bibliography

Gorjón S.P., Greslebin A.G., Rajchenberg M. 2013. The genus Aleurodiscus s.l. (Stereaceae,
Russulales) in the Patagonian Andes. Mycol. Progress 12:91-108.
2012. A checklist of corticioid fungi from Chile. http://corticioids.webs.com/Checklists/Chile
http://www.iucnredlist.org/


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted