Fungalpedia – Note 661, Microthyriaceae

 

Microthyriaceae Sacc.

Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank.

Classification: Microthyriales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

Epiphytic, saprobic or parasitic on living or dead leaves, stems, branches or twigs. Superficial hyphae brown or yellow or hyaline, septate, branched, reticulate or absent. Sexual morph: Thyriothecia superficial, orbicular or subglobose, flattened, dark brown to brown, solitary or gregarious, with distinct or indistinct central ostiole, with poorly developed basal layer. Upper wall dark brown to brown, comprising radially arranged cells of textura prismatica, cuboid or angular cells often darkened at the ostiole and tapering at the margin. Hamathecium lacking pseudoparaphyses or with hyaline, cellular, septate or aseptate. Asci 8-spored, bitunicate, fissitunicate, cylindrical to obpyriform, with or without a pedicel, with or without an ocular chamber at the tip. Ascospores overlapping uni- to 3-seriate, fusiform to ellipsoidal, hyaline or brown, usually 1-septum, with cilia or appendages, smooth-walled. Asexual morph: Hyphomycetous. Conidiophores micronematous or macronematous, septate, unbranched or branched. Conidiogenous cells mono- to poly- blastic, determinate or sympodial, clavate, subcylindrical, ampulliform or ovoid. Conidia solitary or in branched chains, aseptate to multi-septate, acrogenous or acropleurogenous (Qiao et al. 2021).

Notes: Hongsanan et al. (2020a) accepted 11 genera in Microthyriaceae and six genera in Microthyriales genera incertae sedis. Wijayawardene et al. (2022) accepted 10 genera of epifoliar fungi while Tothia was excluded from Microthyriales. In this study, we accepted Tothia in Microthyriaceae based on morphology and following Hongsanan et al. (2020a).

Type genus: Microthyrium Desm., Annls Sci. Nat., Bot., sér. 2 15: 137 (1841).

 

References

Hongsanan S, Hyde KD, Phookamsak R et al 2020a – Refined families of Dothideomycetes: orders and families incertae sedis in Dothideomycetes. Fungal Divers 105:17–318.     

Qiao M, Zheng H, Guo JS, Castañeda-Ruiz RF et al 2021 – Two new asexual genera and six new asexual species in the family Microthyriaceae (Dothideomycetes, Ascomycota) from China. MycoKeys 85:1.

Wijayawardene NN, Hyde KD, Dai DQ et al 2022 – Outline of Fungi and fungus-like taxa—2021. Mycosphere 13:53–453.

 

Entry by 

Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai, 50150, Thailand

 

Published online 29 August 2023

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