Taxonomic and phylogenetic re-evaluation of <I>Microdochium, Monographella</I> and <I>Idriella</I>

Abstract

Based on morphology and DNA sequence data the taxonomic relationships of Microdochium, Monographella and Idriella were reassessed. Microdochium is morphologically and phylogenetically circumscribed, and the sexual genus Monographella treated as synonym on the basis that Microdochium has more species, is more commonly encountered, and more frequently used in literature. An epitype is designated for Microdochium phragmites, and several well-known species are redefined based on their morphology and DNA sequence data (LSU, ITS, BTUB and RPB2). Furthermore, the revision of Microdochium led to six new combinations (M. albescens, M. consociatum, M. fusariisporum, M. maydis, M. opuntiae and M. stevensonii) and six new species (M. citrinidiscum, M. colombiense, M. fisheri, M. neoqueenslandicum, M. seminicola and M. trichocladiopsis) being proposed. Microdochium s.str. belongs to a monophyletic clade, together with Idriella lunata and Selenodriella, representing a new family, Microdochiaceae, in Xylariales. Other species previously accommodated in Microdochium belong to different orders in the Ascomycota. Microdochium gracile belongs to Sordariomycetes (incertae sedis) and Paramicrodochium is proposed to accommodate this species. Microdochium tripsaci belongs to Ephelis in Clavicipitaceae, while M. fusarioides belongs to a new genus, Microdochiella in Orbiliales. Idriella s.str. is a monotypic genus phylogenetically closely related to Microdochium. Idriella s.l. separates into different genera in Xylariales (incertae sedis) including Castanediella, Selenodriella, Idriellopsis, Neoidriella and Paraidriella, the last three proposed here as new genera.

Xylariales): Physiological characterization and structural features of its association with wheat.

“…The morphology of strain 22-1 agrees well with the description of M. bolleyi (phylum Ascomycota, Pezizomycotina, Sordariomycetes, Xylariomycetidae, Xylariales, Microdochiaceae) provided by Hernández-Restrepo et al (2016). In pure culture, young colonies were smooth and white-pink in color (Fig.…”

“…In order to approach the species level identification of the strain, descriptions provided by Ellis (1971) and Hernández-Restrepo et al (2016) were considered. For molecular identification, isolate 22-1 was cultured in liquid malt extract 20% (w/v) at 25°C for one week.…”

Fungal Diversity and Mycotoxins in Low Moisture Content Ready-To-Eat Foods in Nigeria

“…Here, we present to the best of our knowledge the first report of Allophoma, Fomitopsis, Microdochium, Tolypocladium, and Trametes in food in Africa (Chen et al, 2017). Several of these fungal species (e.g., Allophoma oligotrophica and M. lycopodinum) together with species belonging to Aspergillus, Penicillium and Talaromyces are frequent in outdoor and household/indoor air samples from different continents (Visagie et al, 2014a;Hernández-Restrepo et al, 2016;Chen et al, 2017). These airborne fungi, though commonly saprophytic, have been associated with human infections.…”

Molecular and Morphological Characterization of Two Novel Species Collected from Soil in Korea

“…Nevertheless, morphological and ecological delimitation of Microdochium and Idriella is problematic as well as remains obscure, and taxonomic affinities inferred from molecular data have not yet been established. Furthermore, to accommodate genera like Microdochium, Idriella, and Selenodriella, the taxonomic relationships of Microdochium Syd., Monographella Petr., and Idriella Nelson & Wilh were recently defined based on morphology and DNA sequence data, and introduced a new family Microdochiaceae Hern.-Restr., Crous & Groenew (Sordariomycetes, Xylariales) [17].…”