Generic classification of some more hyphomycetes with solitary conidia borne on phialides

Unlike most phialide-producing fungi that liberate a multiplicity of conidi a fi om each conidiogenous cell, only conidia are formed on phialide-like c onidiogenous cells in Aphanocladium, Verticimonosporium, and some species o f A group of isolates obtained from soil of native Artemisia tridentata (sa gebrush) grassland in Wyoming and from soil in Iraq is compared with these genera and classified as a fourth genus, Stanjemonium, honouring Stanley J. Hughes. analyses of partial nuclear small- (18S) and large-subunit (28S) r DNA sequences indicate that Stanjemonium spp. a monophyletic group with Eme ricellapsis. Sequences from the nuclear 18S and 28S rDNA were too conserved to resolve species of Stanjemonium; however, phylogenetic analysis of beta -tubulin and translation elongation factor 1 alpha gene and introns resolve d all species distinguished morphologically. Numerous conidiogenous cells o r denticles are scattered the cells of aerial hyphae in Aphanocladium and S tanjemonium spp., very rapidly collapsing into denticles in the former, mor e persistent and leaving broad scars in the latter In Cladobotryum-Sibirina and Verticimonosporium spp., cells are discrete in terminal and intercalar y whorls; phialides of the latter taxon are particularly swollen. The of Ap hanocladium is not yet resolved. Two species are recognized in Verticimonos porium. Three new species of are described, and one new combination from Ap hanocladium is proposed, along with one new species of Cladobotryum.