J Syst Evol ›› 2021, Vol. 59 ›› Issue (5): 1065-1080.DOI: 10.1111/jse.12705

• Research Articles • Previous Articles     Next Articles

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, Paul M. Kirk1,5, Kathryn E. Bushley6, Cai-Hong Dong1, David L. Hawksworth7,8,9, and Yi-Jian Yao1*   

  1. 1 State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
    3 Medical Mycology Research Center, Chiba University, 1‐8‐1, Inohana, Chuo‐ku, Chiba 260‐8673, Japan
    4 College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China
    5 Biodiversity Informatics & Spatial Analysis, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK
    6 Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN 55108, USA
    7 Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
    8 Comparative Plant and Fungal Biology, Royal Botanic Gardens, Kew, Surrey TW9 3DS, UK
    9 Jilin Agricultural University, Changchun 130118, China
  • Received:2019-11-04 Accepted:2020-10-29 Online:2020-11-09 Published:2021-09-01

Abstract: Since the discovery of the Pleurocordyceps/Polycephalomyces” clade unaffiliated with the clades of Clavicipitaceae s. str., Ophiocordycipitaceae, and Cordycipitaceae of clavicipitaceous fungi, some taxa have been published and more fungal material relevant to the group have become available for further study. Here, a multigene phylogeny using nrSSU, nrLSU, tef1, rpb1, and rpb2 was constructed with some of the recently discovered additional taxa using maximum likelihood and Bayesian analyses (BI) 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 “P. formosus-like” grouped in this new clade and do indeed represent the true P. formosus and that species previously included in the genus Polycephalomyces required a new generic name. Based on the phylogenetic analyses and morphological characteristics, including 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 P. formosus is selected and the circumscription of Polycephalomyces is discussed.

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