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Multilocus phylogenetic analysis reveals that Cyttariales is a synonym of Helotiales

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Abstract

Cyttaria is a morphologically and biologically distinct genus comprising wood-inhabiting species that are biotrophic associates of trees in the genera Nothofagus sensu stricto and Lophozonia in southern South America, Australia, and New Zealand. The uniqueness of the fruit bodies and habitat of Cyttaria has led taxonomists to justify its placement in its own order, Cyttariales, in Leotiomycetes. A multilocus phylogenetic reconstruction of the class Leotiomycetes incorporating new sequence data from Cyttaria nigra shows Cyttariaceae to have an isolated position near the base of Helotiales, with weak support for a relationship with Polydesmia pruinosa (incertae sedis) and Chlorociboriaceae. Cyttariales is here proposed as a synonym of Helotiales.

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Fig. 1
Fig. 2

source of the genome data for those that have had their genome sequenced (JGI joint genome initiative, MWLR Manaaki Whenua–Landcare Research, NCBI National Center for Biotechnology Information)

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Data availability

The datasets generated and analyzed during this study are available as Supplemental Materials S1 (data matrix) and S2 (partitions file with best-fit models).

Code availability

Not applicable.

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Funding

This work was supported in part by the U.S. National Science Foundation (DEB-2018098 to D.H.). P.R.J. and D.P. were supported through the Manaaki Whenua–Landcare Research Biota Portfolio with funding from the Science and Innovation Group of the New Zealand Ministry of Business, Innovation and Employment.

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D.P. and P.R.J. generated sequence data. D.H. performed phylogenetic analyses. D.H. and P.R.J. wrote the first draft of the manuscript. All authors read and approved the final version of the manuscript.

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Correspondence to Danny Haelewaters.

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Haelewaters, D., Park, D. & Johnston, P.R. Multilocus phylogenetic analysis reveals that Cyttariales is a synonym of Helotiales. Mycol Progress 20, 1323–1330 (2021). https://doi.org/10.1007/s11557-021-01736-2

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