• 1Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Acanthotrema brasilianum (Hale) Frisch

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Scientific name
Acanthotrema brasilianum
(Hale) Frisch
Common names
IUCN Specialist Group
Assessment status
Proposed by
Isaias de Oliveira Junior
Comments etc.
André Aptroot, Anders Dahlberg, Isaias de Oliveira Junior

Assessment Notes

Taxonomic notes

This species is characterized by its open apothecia in irregular cracks in thallus and elongated when mature. Ascospores predominantly transversely septate but with occasional longitudinal septa, fusiform with acute ends.

Why suggested for a Global Red List Assessment?

Due to this species relation with tropical areas that still suffers anthropic actions, this species might be considered to be included as Near Threatened species.

Geographic range

This is species is known in 6 countries. In Brazil, this species is mostly located at the Central-West, Southeast, Northeast, and North Regions of Brazil.

Population and Trends

There are 33 records in GBIF database, where 21 records to Brazil, 6 to Costa Rica, 2 to Cameroon, and the others are distributed in small percentages to the other countries.

Population Trend:

Habitat and Ecology

This species is related to Tropical Forest and Rainforest. In Brazil, This species can be found at the Atlantic Rainforest and Amazon forest.

Subtropical/Tropical Moist Lowland ForestSubtropical/Tropical Moist Montane Forest


In Brazil, due to this species related biomes, Atlantic Rainforest and Amazon Forest that suffer anthropic actions, this species is exposed to natural and human-caused factors that rule its diversity and abundance.

Housing & urban areasTourism & recreation areasSmall-holder farmingAgro-industry farmingSmall-holder plantationsAgro-industry plantationsRoads & railroadsUnintentional effects (species being assessed is not the target)Increase in fire frequency/intensityHabitat shifting & alteration

Conservation Actions

In Brazil, the highest numbers of records are also correlated to preserved areas, but unfortunately, those spaces still being affected by negatives influences. So, formal education to the population that lives near those areas and the park managers can start to change the situation.

Resource & habitat protectionSite/area managementHabitat & natural process restorationFormal education

Research needed

Even knowing the regions that this species can be located, the distribution and trends to this species remains unknown.

TaxonomyPopulation size, distribution & trends

Use and Trade


Country occurrence

Regional Population and Trends

Country Trend Redlisted