CR

Arthonia septemlocularis

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Arthonia septemlocularis faces severe threats from habitat degradation and air pollution affecting its specialized lichen communities. The species' extremely limited distribution makes it particularly vulnerable to local environmental changes, with urban development and industrial emissions posing the greatest risks to its survival. Climate change may further stress the delicate microhabitats this critically endangered lichen requires.

Threat summary

Habitat

This critically endangered lichen species inhabits specialized microhabitats on bark of mature deciduous trees, typically in old-growth or semi-natural woodland environments. It requires specific atmospheric conditions and substrate chemistry that are increasingly rare in modern landscapes.

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Cavendishia macrocephala

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Frequently asked questions

Why is Arthonia septemlocularis classified as Critically Endangered?
Arthonia septemlocularis is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Arthonia septemlocularis faces severe threats from habitat degradation and air pollution affecting its specialized lichen communities. The species' extremely limited distribution makes it particularly vulnerable to local environmental changes, with urban development and industrial emissions posing the greatest risks to its survival. Climate change may further stress the delicate microhabitats this critically endangered lichen requires.
Where does Arthonia septemlocularis live?
Arthonia septemlocularis occurs in Colombia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Arthonia septemlocularis?
The main threats to Arthonia septemlocularis 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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