P. fibrillatae P. magellanica Protousnea is a genus of lichenised ascomycetes in the large family Parmeliaceae.

Protousnea species have a fruticose growth form, similar to beard lichens (genus Usnea).

The genus is endemic to southern South America.

[2] The genus was circumscribed in 1976 by Hildur Krog as a segregate genus from Usnea.

This Parmeliaceae-related article is a stub.