Lichenoconium christiansenii sp.nov. from Nodobryoria abbreviata (Parmeliaceae) in the Pacific Northwest, with a key to the known lichenicolous species

Abstract

Lichenoconium christiansenii sp. nov. is described and illustrated from the apothecia of Nodobryoria abbreviata (syn. Bryoria abbreviata) in Washington State, USA. The species recalls L. lichenicola, but differs in the more subglobose conidia and the shorter conidiogenous cells as well as in occurring on a different host. A key to the 14 species now known in the genus is provided. Lichenoconium cargillianum is also reported from Letharia vulpina for the first time.