Three new species of Lichenopeltella (Microthyriaceae, Ascomycota) from northwest North America

Three new species of Lichenopeltella are described based on recent floristic work on lichens and lichenicolous fungi in the Pacific Northwest, bringing the total number of species recognized in North America to six. All three newly described species grow on epiphytic crustose lichens: Lichenopeltella biatorae grows on Biatora flavopunctata (British Columbia, Washington), L. arctomiae on Arctomia delicatula (Montana), and L. leprosulae on Myochroidea leprosula (British Columbia). The new species are compared with the morphologically most similar species of the genus, and a key to all known species of Lichenopeltella in North America is provided.