Phacopsis lethariellae

Phacopsis lethariellae
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Lecanorales
Family:	Parmeliaceae
Genus:	Phacopsis
Species:	P. lethariellae
Binomial name
Phacopsis lethariellae Hafellner & Rambold (1995)

Phacopsis lethariellae is a species of lichenicolous (lichen-dwelling) fungus in the family Parmeliaceae. It was formally described as a new species in 1995 by Josef Hafellner and Gerhard Rambold. The type specimen was collected by the first author from La Fortaleza (La Gomera) at an altitude of 1,180 m (3,870 ft), where it was found growing on the thallus of the lichen Lethariella intricata. It causes formations of galls, which also creates a torsion on the thallus. It has dark brown to black apothecia that are typically 0.3–0.5 mm in diameter, with a convex disc. Its ascospores are ellipsoid to ovoid, measuring 11–13 by 6–7 μm. The fungus, known to occur only in the Canary Islands, is named after the genus of its host.