Parmeliella parvula
Local name: dvärgblylav
Parmeliella parvula is a small, foliose lichen species with distinctive bluish-gray thalli that form rosette-like patches on substrates. This diminutive lichen plays an important ecological role as a pioneer species in specialized microhabitats, contributing to nutrient cycling and providing substrate for other cryptogamic communities.
Photo: iNaturalist: (c) jrgallop, all rights reserved, uploaded by jrgallop
Taxonomy & Classification
Kingdom
Fungi
Phylum
Ascomycota
Class
Lecanoromycetes
Order
Peltigerales
Family
Pannariaceae
Genus
Parmeliella
Parmeliella parvula belongs to the family Pannariaceae, order Peltigerales, within the Lecanoromycetes class.
Species Profile
Parmeliella parvula is a small, foliose lichen species with distinctive bluish-gray thalli that form rosette-like patches on substrates. This diminutive lichen plays an important ecological role as a pioneer species in specialized microhabitats, contributing to nutrient cycling and providing substrate for other cryptogamic communities.
Parmeliella parvula, a critically endangered lichen species, faces severe decline primarily due to habitat loss and degradation of its specialized forest environments. Air pollution, particularly nitrogen deposition and acid rain, significantly impacts this pollution-sensitive species. Climate change further threatens the specific microhabitat conditions this lichen requires for survival.
Key Facts
Habitat & Distribution
Parmeliella parvula grows on smooth bark of deciduous trees, particularly in humid, shaded locations within old-growth and mature forests. It requires stable microclimatic conditions with consistent moisture levels and clean air quality typical of undisturbed woodland environments.
Threats
IUCN Red List: Critically Endangered
Parmeliella parvula, a critically endangered lichen species, faces severe decline primarily due to habitat loss and degradation of its specialized forest environments. Air pollution, particularly nitrogen deposition and acid rain, significantly impacts this pollution-sensitive species. Climate change further threatens the specific microhabitat conditions this lichen requires for survival.
Acid rain and atmospheric pollutants
Air pollution and nitrogen deposition
Habitat loss and forest degradation
Climate change and altered microhabitat conditions
Loss of suitable host trees
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
This page: SpeciesRadar (2025). Parmeliella parvula (Parmeliella parvula). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/dvargblylav