title: Foliicolous fungi from Arctostaphylos pungens in Mexico.
abstract: Arctostaphylos pungens "Manzanita" is an important shrub in the southwestern USA, and northern and central Mexico. Manzanita bears apple-like fruit that is utilised for a range of edible products. Over the past two years, several foliar disease problems were noted on this host in the San José de Gracia region of Mexico. The aim of the present study was to elucidate their identity through the analysis of morphological characters and DNA phylogeny (based on the large subunit nuclear ribosomal RNA gene and the ITS spacers and the intervening 5.8S rRNA gene of the nrDNA operon) of the fungi associated with these disease symptoms. Three species are newly described: Phaeococcomyces mexicanus sp. nov., a presumed epiphyte, and two species associated with leaf spots and defoliation, namely Coccomyces arctostaphyloides sp. nov. and Passalora arctostaphyli sp. nov. A fourth species is also associated with leaf spots and tip dieback is Harknessia arctostaphyli, for which an epitype is designated. All species can co-occur on the same shrub, which adds to the stress experienced by the plant, leading to further defoliation and dieback.
authors.affiliation: Centro de Ciencias Básicas, Departamento de Microbiología, Universidad Autónoma de Aguascalientes, Av. Universidad No. 940, Colonia Cd. Universitaria, C.P. 20131, Aguascalientes, Ags., Mexico.
authors.forename: Onésimo
authors.initials: O
authors.lastname: Moreno-Rico
authors.affiliation: CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands;
authors.forename: Johannes Z
authors.initials: JZ
authors.lastname: Groenewald
authors.affiliation: CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands; ; Microbiology, Department of Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands ; Wageningen University and Research Centre (WUR), Laboratory of Phytopathology, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands.
authors.forename: Pedro W
authors.initials: PW
authors.lastname: Crous
keywords: Coccomyces; Harknessia; ITS; LSU; Passalora; Phaeococcomyces; systematics
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