This month Mycological Research News features the naming of a rust hybrid as a nothospecies, presents a synopsis of a revised ascomycete system, and the identity of British cramp balls. The 20 research papers in this issue include ones reporting a natural hybrid between two species of Melampsora rust fungi, the molecular detection of Rhizoctonia solani subgroups, variation in Alternaria alternata on tomato, genes coding for proteins involved in VA mycorrhizal formation, pycniospore cap production in rusts, Phakopsora cuticle penetration, variation in Dothiostroma pini, Aspergillus evolutionary rates in a chemostat, and metal tolerance in Oidiodendron ericoid mycorrhizas. Three papers concern Agaricus bisporus, one on oxalate decarboxylase production, and two on its pathogens. The following new scientific names are introduced: Cornuvesica and Halorosellinia gens. nov.; Melampsora ×columbiana nothosp. nov.; Helicodendron microsporum sp. nov.; Cornuvesica falcata (syn. Ceraotocystis falcata), H. oceanicum (syn. Hypoxylon oceanicum), and Sporisorium andropogonis-finitimi (syn. Ustilago andropogonis-finitimi) combs. nov.