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Federal Protection: No US federal protection

State Protection: No Georgia state protection

Global Rank: GNR

State Rank: SU

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: None

Element Occurrences (EOs) in Georgia: 0

Habitat Summary for element in Georgia: Hardwood swamp forest

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Description

Pale thallus with broad, misshapen dark lirellae; MICROSCOPY: muriform spores as large as 50 x 20 µm; CHEMISTRY: K-reactive pigment (in epihymenium?); FIELD ID: the "blot" commas vary subtly in thallus color and blot shape, but can only reliably be told apart by dissection & chemical tests

Similar Species

Arthonia apatetica has 2-celled spores & a chlorococcoid photobiont; A. interveniens has muriform spores as large as 30 x 10 µm; A. macrotheca has larger muriform spores & no reaction to K; A. platygraphidae has spores with 11-17 transverse septae separating cells (not muriform); Arthothelium ruanum has muriform to submuriform spores as large as 23 x 10

Related Rare Species

None

Habitat

Hardwood swamp forest, on Magnolia virginiana bark

Life History

Corticolous crustose lichenized fungus, photobiont an alga in Trentepohlia

Survey Recommendations

None

Range

Coastal Plain (1 record)

Threats

Unknown

Georgia Conservation Status

Rare

Conservation Management Recommendations

None

References

Brodo, I. M. 2001. Lichens of North America. 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.

Lücking, R., F. Seavey, R. S. Common, S. Q. Beeching, O. Breuss, W. R. Buck, L. Crane, M. Hodges, B. P. Hodkinson, E. Lay, J. C. Lendemer, R. T. McMullin, J. A. Mercado-Diaz, M. P. Nelsen, E. Rivas Plata, W. Safranak, W. B. Sanders, H. P. Schaefer Jr., & J. Seavey. 2011. The lichens of Fakahatchee Strand Preserve State Park, Florida: proceedings from the 18th Tuckerman Workshop. Florida Museum of Natural History Bulletin Vol. 49: 127-186.

Authors of Account

Malcolm Hodges

Date Compiled or Updated

27 February 2022