التعريف: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)
Known occurrences, collected specimens and observations of Erysiphe semitosta (Berk. & M. A. Curtis ex Cooke & Peck) U. Braun & S. Takam. 2000. View this species on GBIF