Journal of Systematics and Evolution

• •    

  

  • 收稿日期:2019-11-04 接受日期:2020-10-29

Pleurocordyceps gen. nov. for a clade of fungi previously included in Polycephalomyces based on molecular phylogeny and morphology

Yong-Hui Wang1,2, Sayaka Ban3, Wen-Jing Wang1, Yi Li4, Ke Wang1,2, Paul M. Kirk1,5, Kathryn E. Bushley6, Cai-Hong Dong1, David L. Hawksworth7,8,9, and Yi-Jian Yao1*   

  1. 1State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
    2University of Chinese Academy of Sciences, Beijing 100049, China
    3Medical Mycology Research Center, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8673, Japan
    4College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China
    5Biodiversity Informatics & Spatial Analysis, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, UK
    6Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN, USA
    7Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
    8Comparative Plant and Fungal Biology, Royal Botanic Gardens, Kew, Surrey TW9 3DS, UK
    9Jilin Agricultural University, Changchun 130118, Jilin Province, China
  • Received:2019-11-04 Accepted:2020-10-29

Abstract:

Since the discovery of the Pleurocordyceps/ Polycephalomyces’ clade unaffiliated with the clades of Clavicipitaceae s. str., Ophiocordycipitaceae and Cordycipitaceae of clavicipitaceous fungi, a number of taxa have been published subsequently and more fungal material relevant to the group have become available for further study. Here, a multi-gene phylogeny using nrSSU, nrLSU, tef1, rpb1, and rpb2 was constructed with some of the recently discovered additional taxa by ML and Bayesian analyses to test and refine the current phylogenetic framework for Cordyceps s. lat. and other clavicipitaceous fungi. In addition to the well-supported major Pleurocordyceps/ ‘Polycephalomyces’ clade revealed previously, another clade with newly added taxa referred to as ‘Polycephalomyces formosus-like’ from Japan was found to be sister to the Pleurocordyceps/ ‘Polycephalomyces’ clade. Extensive investigation revealed that strains named ‘Polycephalomyces formosus-like’ grouped in this new clade and do indeed represent the true Polycephalomyces formosus and that species previously included in the genus Polycephalomyces require a new generic name. Based on the phylogenetic analyses and morphological characteristics, including available both sexual and asexual morphs when available, the new generic name Pleurocordyceps is introduced and relevant new combinations are made. A newly designated lectotype and a supporting epitype for Polycephalomyces formosus is selected and the circumscription of Polycephalomyces is discussed.

Key words: Clavicipitaceae, molecular systematics, new taxa, typification