Loading profile. Please wait . . .
Catillaria chalybeia (Borrer) Massal.
Tiny Rust Buttons
Federal Protection: No US federal protection
State Protection: No Georgia state protection
Global Rank: G3G5
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
Thin thallus, greenish to endolithic, with black apothecia 0.3-0.4 mm in diameter; disks convex, borders disappearing with age; MICROSCOPY: spores colorless, 2-celled, narrowly ovoid, 8/ascus, about 6-15 x 2.5-5 µm; FIELD ID not possible; the dotlets & tiny buttons can be a confusing group, best sorted by dissection & examination of spores & disks
Catillaria lenticularis is on calcareous substrates; other dark-disked crusts on silicious rock include Bacidina, Buellia & Porpidia species, most of which have larger disks or more visible thalli than this species
None
Rock outcrops, boulders, on silicious rock (HCl-); 1 record on brick
Saxicolous crustose lichenized fungus, photobiont an alga in Myrmecia or Dictyochloropsis
None
Cumberland Plateau, Southern Blue Ridge, Piedmont
Unknown
Rare; like other tiny buttons, this species is easily overlooked, and is likely undercounted
None
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 Unpublished manuscript, New York Botanical Garden, Bronx, NY.
Malcolm Hodges
15 July 2022