Arched Earthstar
VU

Arched Earthstar

Geastrum fornicatum

Unknown

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

Overview

Geastrum fornicatum, commonly known as the acrobatic earthstar or the arched earthstar, is an inedible species of mushroom in the family Geastraceae. Like other earthstar mushrooms, the thick outer skin splits open at maturity, exposing the spore sac to the elements. It is found in the southwest United States.

The Arched Earthstar faces significant threats from habitat degradation and loss of suitable woodland environments due to deforestation, agricultural expansion, and urban development. Climate change and altered precipitation patterns further threaten the specific moisture and temperature conditions this fungus requires for reproduction and survival.

Threat summary

Habitat

Deciduous and mixed woodlands, particularly beech and oak forests, where it grows in leaf litter and humus-rich soils. The species favors well-drained woodland floors with moderate moisture levels and partial shade conditions.

TERRESTRIAL· major

Frequently asked questions

Why is Arched Earthstar classified as Vulnerable?
Arched Earthstar is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. The Arched Earthstar faces significant threats from habitat degradation and loss of suitable woodland environments due to deforestation, agricultural expansion, and urban development. Climate change and altered precipitation patterns further threaten the specific moisture and temperature conditions this fungus requires for reproduction and survival.
Where does Arched Earthstar live?
Arched Earthstar occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Arched Earthstar?
The main threats to Arched Earthstar are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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