Rossetti's Pouncewort
Cololejeunea rossettiana
Conservation status data sourced from the IUCN Red List of Threatened Species.
Taxonomy & Classification
Kingdom
Plantae
Phylum
Marchantiophyta
Class
Jungermanniopsida
Order
Porellales
Family
Lejeuneaceae
Genus
Cololejeunea
Rossetti's Pouncewort belongs to the family Lejeuneaceae, order Porellales, within the Jungermanniopsida class.
Species Profile
Species profile data sourced from the IUCN Red List of Threatened Species.
Rossetti's Pouncewort faces severe threats from habitat destruction and degradation of its specialized epiphytic environments. The species' extremely limited distribution and specific microhabitat requirements make it highly vulnerable to environmental changes and human disturbance. Climate change and altered precipitation patterns further threaten the delicate moisture balance required for this bryophyte's survival.
Key Facts
Habitat & Distribution
This tiny epiphytic liverwort grows on bark and branches of trees in humid tropical and subtropical forests, typically in areas with consistent moisture and filtered light. It requires specific microhabitat conditions including stable humidity levels and suitable host tree species for attachment and growth.
Threats
IUCN Red List: Critically Endangered
Rossetti's Pouncewort faces severe threats from habitat destruction and degradation of its specialized epiphytic environments. The species' extremely limited distribution and specific microhabitat requirements make it highly vulnerable to environmental changes and human disturbance. Climate change and altered precipitation patterns further threaten the delicate moisture balance required for this bryophyte's survival.
Climate change and altered precipitation patterns
Disturbance to host trees and epiphytic substrates
Extremely limited distribution and small population size
Habitat destruction and forest clearance
Air pollution and atmospheric changes
National vs Global Threat Status
How this species is assessed at the national level compared to its IUCN global status (CR).
| Country | National Status | Global Status | Comparison |
|---|---|---|---|
| EU | LCLeast Concern | CRCritically Endangered | Lower local risk |
| EU | LCLeast Concern | CRCritically Endangered | Lower local risk |
National Red List data sourced from the National Red List Project (nationalredlist.org, ZSL) and country-specific Red List authorities.
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
National Red Lists: ZSL (2025). National Red List. Zoological Society of London. Available at: https://www.nationalredlist.org
This page: SpeciesRadar (2025). Rossetti's Pouncewort (Cololejeunea rossettiana). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/rossettis-pouncewort