• Proposed
  • Under Assessment
  • DDPreliminary Assessed
  • 4Assessed
  • 5Published

Xylaria nigromedullosa Trierv.-Per. & A.I. Romero

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Scientific name
Xylaria nigromedullosa
Trierv.-Per. & A.I. Romero
Common names
IUCN Specialist Group
Cup-fungi, Truffles and Allies
Assessment status
Preliminary Assessed
Preliminary Category
Proposed by
Larissa Trierveiler-Pereira
Diogo H. Costa-Rezende, Larissa Trierveiler-Pereira, Juliano M. Baltazar, Luciana da Canêz, Marcela Monteiro, Francisco Calaça, Genivaldo Alves-Silva
E. Ricardo Drechsler-Santos, Kelmer Martins da Cunha, Gregory Mueller

Assessment Notes


This lignicolous Xylaria species is probably a rare species, since it was found only once in a fragment of Atlantic Forest in Southern Brazil. However, more data are necessary to better understand the species ecology and distribution. Therefore, the species is considered Data Deficient due to lack of data.

Taxonomic notes

Xylaria nigromedullosa Trierv.-Per. & A.I. Romero was described in 2009 based on a specimen collected in a fragment of Atlantic Forest from Southern Brazil, State of Santa Catarina (Trierveiler-Pereira et al., 2009). No synonyms are recorded for the species.

Why suggested for a Global Red List Assessment?

This lignicolous Xylaria species is probably a rare species, since it was found only once in a fragment of Atlantic Forest in Southern Brazil. However, more data is necessary to better understand the species ecology and distribution.

Geographic range

Xylaria nigromedullosa is currently only known from the type locality, a remnant of the Atlantic Forest near the coast (Dense Ombrophilous Forest lowlands), in the State of Santa Catarina, Southern Brazil.

Population and Trends

Xylaria nidromedullosa is known from only one site within Southern Brazil, its type locality, which is not currently protected by any conservation unit. The population size of this species is difficult to assess since it is only known from the original publication, hindering the construction of reliable estimates. The type collection is composed of six stromata from the same piece of rotten wood. The species is conspicuous, however, there are few specialists working on taxonomy of non-lichenized ascomycetes in Brazil. Despite this, the species’ first author has been collecting macrofungi in Southern Brazil for more than fifteen years and found the species only once. Additionally, the Southern Atlantic Forest is one of the most sampled regions in Brazil, with accumulated sampling effort from several mycologists throughout decades.  Therefore, this might indicate that the species is rare.

Population Trend: Uncertain

Habitat and Ecology

Xylaria nigromedullosa is a saprotrophic species that grows on dead wood. Its distribution is restricted to the type locality, an insular remnant of Atlantic Rain Forest (Ombrophilous Dense Forest). Thus its actual habitat and ecology are uncertain.

Subtropical/Tropical Moist Lowland Forest


Where the type collection of Xylaria nigromedullosa was collected the main threats are: urban expansion; real estate speculation in coastal areas; predatory tourism; pollution from the disposal of garbage and even effluents; deforestation and fires; vehicle traffic; and the presence of exotic plant species.

Housing & urban areasTourism & recreation areasAgro-industry farmingAgro-industry plantationsAgro-industry grazing, ranching or farmingUnintentional effects: large scale (species being assessed is not the target) [harvest]

Conservation Actions

The main action to preserve the species is the protection of its habitat and the creation of new conservation areas to harbor the probable microhabitats to which the Atlantic Forest may be restricted in the future. Also, measures must be taken to ensure that the protected Atlantic Forest areas reach a mature state.

Site/area protectionSite/area managementAwareness & communicationsPolicies and regulations

Research needed

Since the species is only known from the type collection, more studies are necessary to investigate where X. nigromedullosa occurs, to estimate its population, distribution and trends. In Brazil, we need more taxonomists trained to study non-lichenized ascomycetes.

TaxonomyPopulation size, distribution & trendsLife history & ecologyPopulation trends

Use and Trade

There are no reported uses.



Trierveiler-Pereira L, Romero AI, Baltazar JM, Loguercio-Leite C. 2009. Additions to the knowledge of Xylaria (Xylariaceae, Ascomycota) in Santa Catarina, Southern Brazil. Mycotaxon 107: 139–156.

Country occurrence

Regional Population and Trends

Country Trend Redlisted