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

Bergerella atrofusca Diederich & Lawrey

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Scientific name
Bergerella atrofusca
Diederich & Lawrey
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Under Assessment
Proposed by
Catia Canteiro
Catia Canteiro, Grace Whitacre
Catia Canteiro, Grace Whitacre

Assessment Notes


Bergerella atrofusca is a pathogen of common, widespread lichen species. Though it has not been frequently described, it is likely to be widespread within its host range and occurs throughout temperate forests with no recorded decline. We recommend this species be categorized as least concern (LC).

Taxonomic notes

Why suggested for a Global Red List Assessment?

EDGE species

Geographic range

This species was recently described from two Alpine locations in Osttirol, Austria (Lawrey et al. 2020), and there is another report of it in Mt. Egginer, Switzerland (Kray and Weber 2020). However, considering this is an overlooked and recently described species with common and widespread host species, it is very likely that it occurs across a much wider range within the Alps (Lawrey et al. 2020).

Population and Trends

There is currently no specific information on the population size and trend of this species. However, its host species is common and widespread (Lawrey et al. 2020), and it is suspected that Bergerella atrofusca is also common and widespread within its host range. Although this species should be easy to detect through its dense agglomerations of dark brown bulbils (Lawrey et al. 2020), it has likely been overlooked since it was just recently described, and its host species are not a high priority for collection due to its commonality.

Population Trend: Uncertain

Habitat and Ecology

This species is a virulent pathogen of Physcia species, which produces tightly coiled hyphal masses, called bulbils, on the surface of the host lichen or within its tissues (Lawrey et al. 2020). It is known to grow on Physcia aipolia, P. stellaris (Lawrey et al. 2020), and Lecanora (Kray and Weber 2020) hosts, on shaded, cool, and humid areas on Larix or Salix trees (Lawrey et al. 2020).

Temperate Forest


Conservation Actions

Research needed

Population size, distribution & trendsLife history & ecology

Use and Trade


Country occurrence

Regional Population and Trends

Country Trend Redlisted