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

Rigidoporus aurantiacus Ryvarden & Iturr.

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Scientific name
Rigidoporus aurantiacus
Ryvarden & Iturr.
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Proposed by
Ailton Matheus
Comments etc.
Ailton Matheus, Tatiana Gibertoni

Assessment Notes

Taxonomic notes

Basidiomata annual, more seldom perennial, pileate, sessile or broadly attached, often imbricate andgrowing in large clusters, consistency hard when dry; pileus dimidiate to flabelliform, up to 22 cm long and 10 cm wide, up to 3 cm thick in individual pilei,upper surface first orange-reddish -brown and dull,then smoother, turning glabrous and fading to palereddish brown, concentrically zonate-sulcate, pore surface deep orange, fading to ochraceous, pores round to angular, 6–9 per mm, dissepiments very thin; tubes single-layered but sometimes stratifiedand up to 1 cm long, tubes reddish-brown near the pore mouth at least; context white, cream to wood colored, in some specimens with a distinct horizontal dark line or zone slightly above the bottom of the tubes, radially fibrous, up to 2 cm thick (Ryvarden & Iturriaga 2003).

Why suggested for a Global Red List Assessment?

Geographic range

The species is known in four countries and mostly reported in Brazil.

Population and Trends

There are about 8 records of this species in GBIF, most of them in Brazil. This species can be considered as as rare.

Population Trend: Uncertain

Habitat and Ecology

The species in Brazil occurs in the Atlantic Forest and the Amazon.

Subtropical/Tropical Moist Lowland Forest


In Brazil the species can be found in Amazonia, currently being deforested at the highest rates in recent decades, and Atlantic Forest, a hotspot.

Housing & urban areasShifting agricultureAgro-industry farmingSmall-holder plantationsAgro-industry plantationsRoads & railroadsUnintentional effects (species being assessed is not the target)Unintentional effects: subsistence/small scale (species being assessed is not the target) [harvest]Unintentional effects: large scale (species being assessed is not the target) [harvest]Increase in fire frequency/intensityHabitat shifting & alteration

Conservation Actions

There are records in areas that are not protected

Site/area protectionResource & habitat protection

Research needed

Its distribution through modeling of the ecological niche.

TaxonomyPopulation size, distribution & trends

Use and Trade




Country occurrence

Regional Population and Trends

Country Trend Redlisted