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

Myriotrema microporum (Mont.) Hale

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Scientific name
Myriotrema microporum
(Mont.) Hale
Common names
IUCN Specialist Group
Assessment status
Proposed by
Isaias de Oliveira Junior
Comments etc.
Isaias de Oliveira Junior

Assessment Notes

Taxonomic notes

This species is known by its thick areolate fissured dark dull grey thallus, small with double margins ascomata, 8-spore per ascus, transversely 3-septate and hyaline ascospores, 10–18 ×5–8 μm (Joshi et al., 2012, 2018)

Synonymy: Coscinedia microporum (Mont.) A. Massal., Atti Inst. Veneto Sci. lett., ed Arti, Sér. 3 5: 256 (1860) [1859-1860]; Coscinedia microsporum (Mont.) A. Massal., Atti Inst. Veneto Sci. lett., ed Arti, Sér. 3 5: 256 (1860) [1859-1860]; Ocellularia micropora (Mont.) Müll. Arg., Flora, Regensburg 74(1): 112 (1891); Thelotrema microporum Mont., Annls Sci. Nat., Bot., sér. 3 10: 130 (1848).

Why suggested for a Global Red List Assessment?

Due to all the previous information this species might be considered as Least Concern (LC) until a better understanding.

Geographic range

This is species is known in 19 countries. In Brazil, only one occurrence to this species is known, located North of Brazil according to GBIF database.

Population and Trends

There are 140 records in GBIF database, distributed in Australia (64 records), India (16 records), Malaysia (16 records), and the other occurrences are distributed in small percentages.

Population Trend:

Habitat and Ecology

This species is distributed in Pantropical areas. In Brazil, this species can be found at the Amazon Rainforest in North of Brazil.

Subtropical/Tropical Dry ForestSubtropical/Tropical Moist Lowland Forest


In Brazil, this species is founded in Amazon Rainforest that is a biomes that still suffer anthropic actions in special wildfire, natural and criminal caused, and area suppression

Tourism & 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 record is related 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 protectionHabitat & natural process restorationFormal education

Research needed

Actions that are orientated to taxonomy and exploration to new sites need to be stimulated until a better understanding of this species status.

TaxonomyPopulation size, distribution & trends

Use and Trade



Country occurrence

Regional Population and Trends

Country Trend Redlisted