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Pannaria pezizoides f. coronata (Hoffm.) Trevis. (1869)
Trachyderma nebulosum var. coronatum (Hoffm.) Trevis. (1869)
Pannaria brunnea f. coronata (Hoffm.) Arnold (1881)
Pannaria nebulosa var. coronata (Hoffm.) H.Olivier (1882)
Moelleropsis nebulosa f. coronata (Hoffm.) Gyeln. (1940)
Protopannaria pezizoides, the gray moss-shingle, is a species of squamulose lichen in the family Pannariaceae. It was first described scientifically by the German botanist Georg Heinrich Weber in 1778. It has a long and complex taxonomic history, and has an extensive synonymy. It was transferred to the genus Protopannaria by Per Magnus Jørgensen and Stefan Ekman in 2000; it was assigned as the type species of the genus. Protopannaria pezizoides is widespread, with a continental distribution that includes Africa, Asia, North America, and Oceania. The lichen thrives in moist and/or humid conditions, predominantly found on soil and at the bases of trees, and occasionally on rocks, within forested and arctic-alpine settings. Its photobiont partner is from Nostoc, a genus of cyanobacteria. It does not contain any lichen products, and all standard chemical spot tests are negative.
^ McMullin, R. Troy (2023). Lichens. The Macrolichens of Ontario and the Great Lakes Region of the United States. Firefly Books. p. 421. ISBN978-0-228-10369-1.
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