ABSTRACT
The pyrenomycete genus Endoxyla (Ascomycotina, Clypeosphaeriaceae) is revised based on the examination of type and authentic material. Five species, E. macrostoma, E. munkii sp. nov., E. operculata, E. parallela and E. xanthostroma sp. nov., are included and a key to the species is given. Endoxyla macrostoma is designated as holotype. Sixteen species and one variety are excluded from Endoxyla and three species are treated as doubtful. The synonymy of Ceratostomella with Endoxyla is rejected and a new combination Ceratostomella hyalostoma is proposed. The taxonomic position of Endoxyla is discussed.