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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, rock outcrop complexes

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Description

Pale green-gray thallus, thick, corticate; apothecia 0.1 mm or less in diameter, deeply sunken in black pits; edges of pits abrupt, exciple separating from pit walls in many cases, appearing as thin lines running across pits; pockets of red or magenta crystals in medulla; MICROSCOPY: spores brown, submuriform, cells 4 x 1-2, (4-)8/ascus, about 20 x 14 µm; CHEMISTRY: thallus K-, PD-, but magenta crystals K+ purple; FIELD ID: requires dissection to sort from closely related genera

Similar Species

Myriotrema & Leucodecton species are closely related but have different spores or chemistry & lack red crystals in thallus

Related Rare Species

None

Habitat

Mesic hardwood forests, swamps, rock outcrop complexes; substrates: hardwood bark, especially Quercus, Carya, Acer & Nyssa; 1 record on silicious rock

Life History

Corticolous crustose lichenized fungus, photobiont a green alga in Trentepohlia

Survey Recommendations

None

Range

Coastal Plain & southern Piedmont (not far from Fall Line)

Threats

Unknown

Georgia Conservation Status

Only occasionally seen

Conservation Management Recommendations

None

References

Brodo, I. M. 2001. Lichens of North America. Yale University Press, New Haven, Conn.

Brodo, I. M. 2016. Keys to lichens of North America: revised and expanded. Yale University Press, New Haven, Conn.

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.

Harris, R. C. 1995. More Florida lichens including the 10-cent tour of the pyrenolichens. Unpublished manuscript, Bronx, N.Y.

Authors of Account

Malcolm Hodges

Date Compiled or Updated

30 July 2022