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Re-evaluation of Mycoleptodiscus species and morphologically similar fungi

Hernández-Restrepo, M., Bezerra, J., Tan, Y., Wiederhold, N., Crous, P., Guarro, J. and Gené, J. (2019) Re-evaluation of Mycoleptodiscus species and morphologically similar fungi. Persoonia, 42 . pp. 205-227. ISSN 0031-5850 (Print); 1878-9080 (Online)

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Article Link(s): https://doi.org/10.3767/persoonia.2019.42.08

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, Neomycolepto­discus venezuelense gen. & sp. nov. is introduced for a genus similar to Mycoleptodiscus in Muyocopronaceae.

Item Type:Article
Business groups:Biosecurity Queensland
Keywords:Ascomycota; Dothideomycetes; Muyocopron; Sordariomycetes; fungal pathogen; mycoses; new taxa
Subjects:Science > Biology
Science > Microbiology > Microbial ecology
Deposited On:14 May 2019 04:31
Last Modified:14 May 2019 04:48

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