Lecanora perpruinosa

[2] In 2015, Lucyna Śliwa, Zhao Xin, and H. Thorsten Lumbsch proposed to transfer the taxon to the genus Myriolecis.

The disc of the apothecia can appear black or near-black, or dark red to brown, and is heavily dusted with a bluish-white powdery coating called pruina.

[6] The cortex surrounding the apothecia is distinctly paraplechtenchymatous, indicating it is made up of densely interwoven hyphae, providing structural integrity.

[6] In addition to Sweden, the country of its original determination,[1] its distribution in Northern Europe also includes Finland,[6] Norway,[7] and Denmark.

[6][9] In 2000, the lichen was reported growing on limestone cliffs within the Niagara Escarpment Biosphere Reserve in southern Ontario, Canada, marking its first record from North America.