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Pseudocyphellaria perpetua
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Peltigerales
Family:	Peltigeraceae
Genus:	Pseudocyphellaria
Species:	P. perpetua
Binomial name
Pseudocyphellaria perpetua McCune & Miądl. (2002)

Pseudocyphellaria perpetua is a species of corticolous (bark-dwelling), foliose (leafy) cyanolichen in the family Peltigeraceae. It was described as new to science in 2002 by lichenologists Bruce McCune and Jolanta Miądlikowska. It is distinguished from similar species, including some forms of P. crocata, by its yellow medulla and mostly marginal soralia. Other characteristics include its narrow, linear lobes, and its pale lower undersurface. Some molecular phylogenetic analysis suggests that Pseudocyphellaria perpetua and P. crocata are morphotypes of the same phylogenetic species. P. perpetua occurs on both conifer and hardwood trees in oceanic areas of the western North America and in the Russian Far East. It has also been documented as an uncommon species in Nova Scotia (eastern Canada).

References

1. ^ Miadlikowska, Jolanta; McCune, Bruce; Lutzoni, François (2002). "Pseudocyphellaria perpetua, a new lichen from western North America". The Bryologist. 105 (1): 1–10. doi:10.1639/0007-2745(2002)105[0001:ppanlf]2.0.co;2. JSTOR 3244816. S2CID 33926437.
2. Summerfield, Tina C.; Eaton-Rye, Julian J. (2006). "Pseudocyphellaria crocata, P. neglecta and P. perpetua from the Northern and Southern Hemispheres are a phylogenetic species and share cyanobionts". New Phytologist. 170 (3): 597–607. doi:10.1111/j.1469-8137.2006.01701.x. PMID 16626479.
3. Cameron, Robert P.; Richardson, David H.S. (2006). "Occurrence and abundance of epiphytic cyanolichens in protected areas of Nova Scotia, Canada" (PDF). Opuscula Philolichenum. 3: 5–14. doi:10.5962/p.381852.

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• Pseudocyphellaria
• Lichen species
• Lichens described in 2002
• Lichens of the United States
• Lichens of the Russian Far East
• Lichens of Eastern Canada
• Taxa named by Bruce McCune
• Peltigerales stubs