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Myriococcum revisited: a revision of an overlooked fungal genus

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Abstract

The genus Myriococcum was described based on a sterile fungus producing sclerotia. Misinterpretation of these structures resulted in the later addition of several largely unrelated species to this genus and controversy about its phylogenetic placement. The purpose of the study was to revise these species and elucidate their phylogenetic affinities. Based on available herbarium material and living strains, the type species of the genus, Myriococcum praecox, was placed in the family Stephanosporaceae (Agaricomycetes). A new combination, Cryptendoxyla consimilis, is proposed for M. consimile belonging to the Sordariomycetes. A replacement name Crassicarpon hotsonii is proposed for M. thermophilum (Sordariomycetes). Myriococcum spinuligerum most probably belongs to the Eurotiomycetes. The phylogenetic position of M. everhartii remains unclear. The name M. sparsum must be treated as nomen dubium, because its description is based on a non-fungal organism.

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Acknowledgments

I am very grateful to Dagmar Říhová for her instant identification of M. stipitatum as a member of the Porifera and Dave Wilkinson for his assistance in recognizing M. sparsum as a member of testate amoebae. Special thanks are due to Emily Roark and Dominick Shannon (BPI), Ellen Diane Bloch (NYBG), and Markéta Šandová (PRM) for arranging the loans. This study was supported by Institutional Support for Science and Research of the Ministry of Education, Youth and Sports of the Czech Republic.

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  1. Department of Botany, Faculty of Science, Charles University in Prague, Benátská 2, 128 01, Prague, Czech Republic

    Ondřej Koukol

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  1. Ondřej Koukol
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Correspondence to Ondřej Koukol.

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This study was funded by Institutional Support for Science and Research of the Ministry of Education, Youth and Sports of the Czech Republic.

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Handling editor: Stephen W. Peterson.

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Online Resource 1. Alignment of concatenated sequences of ITS and LSU rDNA and EF-1α used for reconstruction of tree on Fig. 1.

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Koukol, O. Myriococcum revisited: a revision of an overlooked fungal genus. Plant Syst Evol 302, 957–969 (2016). https://doi.org/10.1007/s00606-016-1310-x

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