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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: None

Element Occurrences (EOs) in Georgia: 0

Habitat Summary for element in Georgia: Rock outcrops, boulders

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Description

Thin thallus greenish, with dark apothecia 0.3-0.4 mm in diameter; disks convex, borders disappearing with age; MICROSCOPY: spores colorless, 2-celled, 8/ascus; FIELD ID not possible; the dotlets & tiny buttons can be a confusing group, best sorted by dissection & examination of spores & disks

Similar Species

Catillaria chalybeia is on silicious rock; other dark-disked crusts on limestone include Bacidia coprodes, B. granosa, Bacidina egenula & Clauzadea metzleri

Related Rare Species

None

Habitat

Rock outcrops, boulders, on limestone, calcareous sandstone (HCl+)

Life History

Saxicolous crustose lichenized fungus, photobiont an alga in Myrmecia or Dictyochloropsis

Survey Recommendations

None

Range

Cumberland Plateau, Ridge & Valley

Threats

Unknown

Georgia Conservation Status

Rare to occasional; like other tiny buttons, this species is easily overlooked, and is likely undercounted

Conservation Management Recommendations

None

References

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. & D. Ladd. 2005. Preliminary draft: Ozark lichens. Unpublished manuscript, New York Botanical Garden, Bronx, NY.

Authors of Account

Malcolm Hodges

Date Compiled or Updated

15 July 2022