Re-evaluation of Mycoleptodiscus species and morphologically similar fungi

M. Hernández-Restrepo, J. D.P. Bezerra, Y. P. Tan, N. Wiederhold, P. W. Crous, J. Guarro, J. Gené

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Mycoleptodiscus includes plant pathogens, animal opportunists, saprobic and endophytic fungi. The present study presents the first molecular phylogeny and revision of the genus based on four loci, including ITS, LSU, rpb2, and tef1. An extensive collection of Mycoleptodiscus cultures, including ex-type strains from the CBS, IMI, MUCL, BRIP, clinical isolates from the USA, and fresh isolates from Brazil and Spain, was studied morphologically and phylogenetically to resolve their taxonomy. The study showed that Mycoleptodiscus sensu lato is polyphyletic. Phylogenetic analysis places Mycoleptodiscus in Muyocopronales (Dothideomycetes), together with Arxiella, Leptodiscella, Muyocopron, Neocochlearomyces, and Paramycoleptodiscus. Mycoleptodiscus terrestris, the type species, and M. sphaericus are reduced to synonyms, and one new species is introduced, M. suttonii. Mycoleptodiscus atromaculans, M. coloratus, M. freycinetiae, M. geniculatus, M. indicus, M. lateralis (including M. unilateralis and M. variabilis as its synonyms) and M. taiwanensis belong to Muyocopron (Muyocopronales, Dothideomycetes), and M. affinis, and M. lunatus to Omnidemptus (Magnaporthales, Sordariomycetes). Based on phylogenetic analyses we propose Muyocopron alcornii sp. nov., a fungus associated with leaf spots on Epidendrum sp. (Orchidaceae) in Australia, Muyocopron zamiae sp. nov. associated with leaf spots on Zamia (Zamiaceae) in the USA, and Omnidemptus graminis sp. nov. isolated from a grass (Poaceae) in Spain. Furthermore, Neomycolepto-discus venezuelense gen. & sp. nov. is introduced for a genus similar to Mycoleptodiscus in Muyocopronaceae.

Original languageEnglish (US)
Pages (from-to)205-227
Number of pages23
JournalPersoonia: Molecular Phylogeny and Evolution of Fungi
Volume42
DOIs
StatePublished - Jul 2019

Keywords

  • Ascomycota
  • Dothideomycetes
  • Fungal pathogen
  • Muyocopron
  • Mycoses
  • New taxa
  • Sordariomycetes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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