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Federal Protection: No US federal protection

State Protection: No Georgia state protection

Global Rank: GNR

State Rank: SNR

Element Locations Tracked in Biotics: No

SWAP 2015 Species of Greatest Conservation Need (SGCN): No

SWAP 2025 Species of Greatest Conservation Need (SGCN): No

2025 SGCN Priority Tier:

Element Occurrences (EOs) in Georgia: 0

Habitat Summary for element in Georgia: Mesic hardwood forests, swamps

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Description

Pale green to whitish, continuous thallus with a crusty, crystalline appearance; lirellae in radiating groupings or large clusters; raised white ridges edge a reddish-brown, longitudinally striate, concave disk; outer edges of margins usually edged with cracks in thallus; margins sometimes closing over and obscuring disk; MICROSCOPY: exciple not carbonized, hymenium clear, spores colorless, about 8/ascus, 8-9 cells lens-shaped; CHEMISTRY: thallus UV-; FIELD ID: unmistakable, with field UV test

Similar Species

Thalloloma anguinum is similar but has at least some submuriform spores & is UV+ yellow

Related Rare Species

None

Habitat

Mesic hardwood forests & swamps, on Ilex, Nyssa, Quercus, Magnolia & Acer bark (in descending order of abundance)

Life History

Corticolous crustose lichenized fungus, photobiont an alga in genus Trentepohlia

Survey Recommendations

None

Range

Coastal Plain

Threats

Unknown

Georgia Conservation Status

Rare

Conservation Management Recommendations

None

References

Esslinger, T. L. 2021. A cumulative checklist for the lichen-forming, lichenicolous and allied fungi of the continental United States and Canada. Version 24. Opuscula Philolichenum 20: 100-394.

Lendemer, J. C. 2010. Revised keys to the Graphidaceae in southeastern North America. Created for the 2010 Tuckerman Workshop, Augusta, Georgia. The New York Botanical Garden, Bronx, N.Y.

Authors of Account

Malcolm Hodges

Date Compiled or Updated

30 July 2022