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

Vararia incrustata Gresl. & Rajchenb.

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Scientific name
Vararia incrustata
Author
Gresl. & Rajchenb.
Common names
 
IUCN Specialist Group
Mushroom, Bracket and Puffball
Kingdom
Fungi
Phylum
Basidiomycota
Class
Agaricomycetes
Order
Russulales
Family
Lachnocladiaceae
Assessment status
Proposed
Proposed by
Alina Greslebin
Comments etc.
Alina Greslebin

Assessment Notes

Taxonomic notes

This particular species is unique in the genus because of it encrusted, poorly branched subhymenial dichophyses with blunt apices. This uniqueness makes it very valuable.


Why suggested for a Global Red List Assessment?

This species has a narrow geographic distribution, restricted to Tierra del Fuego Island. The population could be decreasing.

Criteria:
B1 VU: this criterium applies because it has been recorded only in Tierra del Fuego. Forest that potentially can harbor this species (Nothofagus betuloides and N. pumilio forets) occupy, at most, 5000 km2, but the actual surface of forest suitable for this species is much less since it has been recorded mostly in humid, pristine forests.
A3 C: The main anthropogenic impacts in forest of Tierra del fuego (forestry and tourisms) have been steadily increasing since the beginning of the twentieth century and are expected to continue increasing.


Geographic range

Known only from Tierra del Fuego in various localities all of them in Ushuaia department:
Argentina, Tierra del Fuego, Dpto. Ushuaia: Ea. Moat; El Martial glacier; Lago Escondido;  road to Termas; Monte Olivia; Ea. El Valdez. Parque Nacional Tierra del Fuego, Bahía Lapataia, Ensenada, Río Pipo.
Not found in the continent even searched in mixed Nothofagus forests of Chubut and Rio Negro.


Population and Trends

Population Trend: unknown but presumable decreasing. The species was recorded in several opportunities in the past. In a survey conducted 1996-1999 it was recorded 14 times. However, in a recent study of fungal diversity in managed and unmanaged forests conducted in 2012-2013 it was recorded only once in pristine forests.

Population Trend: Decreasing


Habitat and Ecology

Growing on Nothofagus betuloides, Nothofagus pumilio and, occasionally, on Drymis winteri. Mostly on much decayed bark of but also and wood. Subantarctic Forest

Temperate Forest

Threats

Anthropic disturbances (forestry, tourisms and recreational use) of it habitat.
Habitat fragmentation.

Tourism & recreation areasUnintentional effects: subsistence/small scale (species being assessed is not the target) [harvest]Recreational activities

Conservation Actions

Resource & habitat protection

Resource & habitat protection

Research needed

Geographic distribution and abundance needs to be assessed to know the actual distribution and to analyze the possible decline.
Knowledge on factors affecting its limited distribution within the host range (why it is not present in continental forests) will be very valuable.
Taxonomy: this species is unique in the genus because of micromorphological features. It will be interesting to study it phylogenetic affinities in order to asses it particular value from an evolutionary and taxonomic point of view

TaxonomyPopulation size, distribution & trends

Use and Trade


Bibliography


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted