The 18th fascicle (20 numbers) of the exsiccata ‘Lichenicolous Biota’ is published. The issue contains material of 16 non-lichenized fungal taxa (10 teleomorphs of ascomycetes, 2 anamorphic states of ascomycetes, 3 basidiomycetes) and 3 lichenized ascomycetes, including paratype material of Biatoropsis hirtae Diederich & Millanes (no 403) and Stigmidium epixanthum Hafellner (no 416). Furthermore, collections of the type species of the following genera are distributed: Marchandiomyces (M. corallinus), Phacopsis (P. vulpina), Phacothecium (P. varium), Xanthoriicola (X. physciae), and Sclerococcum (S. sphaerale). The fascicle contains notable contributions to the fungus floras of Austria, Italy and South Africa.