Xylopsora canopeorum

Species of lichen

Xylopsora canopeorum is a squamulose (scaly), corticolous (bark-dwelling) lichen species in the family Umbilicariaceae. Discovered in the canopies of Sequoia sempervirens in California, United States, it was formally described as new to science in 2018. It is endemic to the central coastal region of California, living within the unique ecosystems of Big Basin Redwoods State Park and Armstrong Redwoods State Natural Reserve, areas known for their ancient coast redwood forests. The lichen evolves from a crust-like to scale-like form, developing into coral-like crusts as it matures, complemented by distinctive flat, black reproductive discs. This species has varying greyish-green to medium brown coloration and occasionally forms soralia, which release powdery reproductive propagules called soredia. Xylopsora canopeorum is distinguished from closely related species by its smaller, partly coral-like squamules (scales), the occurrence of soralia on its surface, and in some specimens, the presence of both thamnolic and friesiic acids within the thallus.

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