Material of several species, including types specimens, have been studied. The following new genera are described: Conohypha (type: Corticium albocremeum Höhn. & Litsch.), Membranomyces (type: Corticium spurium Bourd.), and Parvobasidium (type: Gloeocystidium cretatum Bourd. & Galz.). Twelve new combinations are proposed.