Phylogeny and taxonomic revision of Thelonectria discophora(Ascomycota,Hypocreales,Nectriaceae)species complex  

作　　者：Catalina Salgado-Salazar Amy Y.Rossman Gary J.Samuels Yuuri Hirooka Romina M.Sanchez Priscila Chaverri 

机构地区：[1]Department of Plant Science and Landscape Architecture,University of Maryland,2112 Plant Sciences Building,College Park,MD 20742,USA [2]Systematic Mycology and Microbiology Laboratory,USDA-ARS,Beltsville,MD 20705,USA [3]Biodiversity(Mycology),Eastern Cereal and Oilseed Research Centre,Agriculture and Agri-Food Canada,Ottawa,Ontario K1A 0C6,Canada [4]Centro de Recursos Renovables de la Zona Semiarida-Cerzos Conicet,Universidad Nacional del Sur,Camino La Carrindanga Km7,B8000FWB Bahía Blanca,Provincia de Buenos Aires,Argentina [5]Escuela de Biología,Universidad de Costa Rica,Apartado,11501-2060 San Pedro,San José,Costa Rica

出　　处：《Fungal Diversity》2015年第1期1-29,共29页真菌多样性（英文）

基　　金：funded by a grant from United States National Science Foundation(PEET program)DEB-0925696:“Monographic Studies in the Nectriaceae,Hypocreales:Nectria,Cosmospora,and Neonectria”to University of Maryland(P.Chaverri,G.J.Samuels&A.Y.Rossman).

摘　　要：Specimens regarded as Thelonectria discophora(Thelonectria,Nectriaceae,Hypocreales)constitute a conspicuous group of saprobic fungi on decaying plant material,characterized by red perithecia each with a broad mammiform(nipple-like)apex.The asexual state is characterized by a cylindrocarpon-like morphology,with 3–5 septate macroconidia,unicellular microconidia and chlamydospores that are rarely produced in culture.In the past,T.discophora was regarded as one species with a wide geographic distribution.However,a recent study rejected the monophyly and cosmopolitan distribution of this species,and showed the existence of at least 16 cryptic species distributed in three main groups.By combining the results of phylogenetic analyses of six nuclear loci and morphological studies,we revised the taxonomy of the T.discophora species complex,resulting in the description of 12 new species and four new combinations based on historic names.Even though molecular phylogenetic analyses strongly support the segregation of these species,and are in agreement with previous studies,individual diagnostic morphological characters for each species could not be identified.However,discrete morphological traits corresponding to each of the three main groups of species were discovered.Lineages could be differentiated based on the average values of morphological traits as well as the presence/absence of characteristic asexual propagules and colony growth at 30C.Descriptions,illustrations are provided for the recognized species.

关 键 词：New species Rubus canker Species concept Taxonomy 

分 类 号：O17[理学—数学]