With the change to one scientific name for pleomorphic fungi, generic names typified by sexual and asexual morphs have been evaluated to recommend which name to use when two names represent the same genus and thus compete for use. In this paper, generic names in Pucciniomycotina and Ustilaginomycotina are evaluated based on their type species to determine which names are synonyms. Twenty-one sets of sexually and asexually typified names in Pucciniomycotina and eight sets in Ustilaginomycotina were determined to be congeneric and compete for use. Recommendations are made as to which generic name to use. In most cases the principle of priority is followed. However, eight generic names in the Pucciniomycotina, and none in Ustilaginomycotina, are recommended for protection: Classicula over Naiadella, Gymnosporangium over Roestelia, Helicobasidium over Thanatophytum and Tuberculina, Melampsorella over Peridermium, Milesina over Milesia, Phragmidium over Aregma, Sporobolomyces over Blastoderma and Rhodomyces, and Uromyces over Uredo. In addition, eight new combinations are made: Blastospora juruensis, B. subneurophyla, Cronartium bethelii, C. kurilense, C. sahoanum, C. yamabense, Milesina polypodii, and Prospodium crusculum combs. nov.

Czech Collection of Microoorganisms Faculty of Science Masaryk University 625 00 Brno Czech Republic

Department of Biomedical Sciences and Engineering National Central University 320 Taoyuan City Taiwan

Department of Botany and Plant Pathology Oregon State University Corvallis OR 97333 USA

ETH Zürich Plant Ecological Genetics Universitätstrasse 16 8092 Zürich Switzerland

Faculty of Education Ibaraki University Mito Ibaraki 310 8512 Japan

Mycology and Nematology Genetic Diversity and Biology Laboratory USDA ARS Beltsville MD 20705 USA

Purdue University Department of Botany and Plant Pathology West Lafayette IN 47901 USA

Ruhr Universität Bochum Geobotanik ND 03 174 D 44801 Bochum Germany

Senckenberg Gesellschaft für Naturforschung Frankfurt Germany

Staatliches Museum f Naturkunde Karlsruhe Erbprinzenstr 13 D 76133 Karlsruhe Germany

Systematics Team Manaaki Whenua Landcare Research Auckland 1072 New Zealand

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