Felt Saddle Fungus
VUVulnerable

Felt Saddle Fungus

Helvella macropus

**Felt Saddle Fungus (Helvella macropus)** The Felt Saddle Fungus is a distinctive ascomycete characterized by its saddle-shaped, irregularly lobed cap that ranges from brown to grayish-black. The fruiting body sits atop a tall, hollow stem that can reach 15 centimeters in height, with a characteristic ribbed and fluted surface.

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Countries

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Helvella_macropus

01Classification

Taxonomy & Classification

Kingdom

Fungi

Phylum

Ascomycota

Class

Pezizomycetes

Order

Pezizales

Family

Helvellaceae

Genus

Helvella

Felt Saddle Fungus belongs to the family Helvellaceae, order Pezizales, within the Pezizomycetes class.

02Description

Species Profile

**Felt Saddle Fungus (Helvella macropus)** The Felt Saddle Fungus is a distinctive ascomycete characterized by its saddle-shaped, irregularly lobed cap that ranges from brown to grayish-black. The fruiting body sits atop a tall, hollow stem that can reach 15 centimeters in height, with a characteristic ribbed and fluted surface. This saprophytic fungus plays a crucial ecological role by decomposing organic matter in forest ecosystems, recycling nutrients back into the soil while forming mycorrhizal associations with various tree species. Helvella macropus demonstrates remarkable geographic distribution, occurring across temperate regions of North America, Europe, and Asia, with additional populations documented in parts of Central America, Australia, and select tropical locations. The species typically inhabits deciduous and mixed forests, favoring areas with rich, moist soils and often appearing along forest edges, paths, and disturbed woodland areas. Despite its wide distribution, the species is classified as Vulnerable, though specific threats have not been formally assessed. The unknown population trend suggests limited monitoring data, which hampers comprehensive threat evaluation. Like many forest-dependent fungi, Helvella macropus likely faces pressures from habitat fragmentation, forest management practices, and environmental changes affecting its host tree relationships. Current conservation measures for this species remain largely undocumented, reflecting the broader challenge of fungal conservation where many species lack targeted protection strategies. The species' outlook remains uncertain due to insufficient population monitoring and threat assessment data, highlighting the need for enhanced mycological research and systematic biodiversity surveys across its extensive range.

Helvella macropus faces significant decline due to habitat loss from deforestation and land conversion, particularly affecting the old-growth and mature forest ecosystems it depends on. Climate change and pollution are additional stressors impacting this fungal species' specialized ecological requirements.

Key Facts

IUCN StatusVulnerable (VU)
GroupFungi
03Habitat

Habitat & Distribution

TERRESTRIALMajor
04Threats

Threats

Habitat loss and fragmentation from deforestation

HighOngoing

Land use conversion for agriculture and development

HighOngoing

Loss of mycorrhizal host trees

HighOngoing

Air pollution and acid deposition

MediumOngoing

Climate change altering temperature and moisture regimes

MediumOngoing
Community

Community Sightings

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07Sources

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

This page: SpeciesRadar (2025). Felt Saddle Fungus (Helvella macropus). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/felt-saddle-fungus

Full citation guide & data usage terms