EN

Stigmidium degelii

Unknown

Overview

Stigmidium degelii is a species of lichenicolous (lichen-dwelling) fungus in the family Mycosphaerellaceae. It was described as a new species in 1993 by the Swedish lichenologist Rolf Santesson. The type specimen was collected in Hordaland, Norway, in 1932. The species epithet honours Gunnar Degelius, who was the author's "first teacher in lichenology".

Stigmidium degelii faces severe threats from air pollution and acid rain, which degrade the quality of its lichen host substrates. Climate change and habitat loss through deforestation and urbanization further reduce available suitable environments for this specialized lichenicolous fungus.

Threat summary

Habitat

TERRESTRIAL· major

Other threatened species in Mycosphaerellaceae

EN

Mycosphaerella chimaphilae

Unknown

Frequently asked questions

Why is Stigmidium degelii classified as Endangered?
Stigmidium degelii is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Stigmidium degelii faces severe threats from air pollution and acid rain, which degrade the quality of its lichen host substrates. Climate change and habitat loss through deforestation and urbanization further reduce available suitable environments for this specialized lichenicolous fungus.
Where does Stigmidium degelii live?
Stigmidium degelii occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Stigmidium degelii?
The main threats to Stigmidium degelii are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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