文献类型： 外文期刊
作者： Liu, Jian-Wei 1 ; Ge, Zai-Wei 1 ; Horak, Egon 4 ; Vizzini, Alfredo 5 ; Halling, Roy E. 7 ; Pan, Chun-Lei 8 ; Yang, Zhu 1 ;
作者机构： 1.Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Fungal Divers & Green Dev, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, 132 Lanhei Rd, Kunming 650201, Yunnan, Peoples R China
3.Chinese Acad Sci, Kunming Inst Bot, CAS Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
4.Schlossfeld 17, A-6020 Innsbruck, Austria
5.Univ Torino, Dept Life Sci & Syst Biol, Viale PA Mattioli 25, I-10125 Turin, Italy
6.CNR, Inst Sustainable Plant Protect IPSP SS Turin, Viale PA Mattioli 25, I-10125 Turin, Italy
7.New York Bot Garden, Inst Systemat Bot, 2900 Southern Blvd, Bronx, NY 10458 USA
8.Heilongjiang Acad Agr Sci, Mudanjiang Branch, Mudanjiang 157041, Heilongjiang, Peoples R China
关键词： Amanita; Mycoparasitic fungi; Squamanita; Host preference; Three new taxa
期刊名称：IMA FUNGUS （ 影响因子：3.515； 五年影响因子：4.718 ）
ISSN： 2210-6340
年卷期： 2021 年 12 卷 1 期
页码：
收录情况： SCI
摘要： The systematic position of the enigmatically mycoparasitic genus Squamanita (Agaricales, Basidiomycota) together with Cystoderma, Phaeolepiota, Floccularia, and Leucopholiota is largely unknown. Recently they were recognized as Squamanitaceae, but previous studies used few DNA markers from a restricted sample of taxa from the family and lacked a formal taxonomic treatment. In this study, with newly generated sequences of the type of the genus Squamanita, S. schreieri, and several additional species of the family, the phylogeny is reinvestigated with a concatenated (18S-5.8S-nrLSU-RPB2-TEF1-alpha) dataset. This study reveals that Cystoderma, Phaeolepiota, Squamanita, Floccularia, and Leucopholiota are a monophyletic clade with strong statistical support in Bayesian analysis and form Squamanitaceae. Phaeolepiota nested within Cystoderma; Squamanita, Leucopholiota, and Floccularia clustered together as two monophyletic subclades; and Squamanita was present as a monophyletic clade with strong statistical support in both Maximum Likelihood and Bayesian analyses. The family name Squamanitaceae is formally emended and a detailed taxonomic treatment is presented to accommodate the five genera. Meanwhile, another concatenated (18S-ITS-nrLSU-RPB2-TEF1-alpha) dataset is used to investigate phylogenetic relationships and species delimitation in Squamanita. Our data indicates that "S. umbonata" from the Northern hemisphere forms two species complexes, one complex includes six specimens from North America, Europe, and East Asia, the other includes two specimens from Central America and North America respectively. Futhermore, species of Squamanita can parasitize species of Amanita, besides other fungal species. Squamanita mira parasitizes A. kitamagotake (A. sect. Caesareae), while S. orientalis and S. sororcula are parasites of species belonging to the A. sepiacea complex (A. sect. Validae). "Squamanita umbonata" from Italy occurs on A. excelsa (A. sect. Validae). Three new species of Squamanita from East Asia, viz. S. mira, S. orientalis and S. sororcula are documented with morphological, multi-gene phylogenetic, and ecological data, along with line drawings and photographs, and compared with similar species. A key for identification of the global Squamanita species is provided.
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