Fungalpedia – Note 667, Tumidispora

 

Tumidispora Hongsanan & K.D. Hyde 

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

Index Fungorum, Facesoffungi, MycoBank, GenBank.

Classification: Microthyriaceae, Microthyriales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

Epiphytic on the upper surface of leaves, appearing as small black dots. Superficial hyphae absent. Sexual morph: Thyriothecia superficial, mostly solitary, light brown to brown, circular, flattened, basal peridium poorly developed, easily detached, darker around the central ostiole, dark brown towards the outer lighter rim, irregularly rounded at the margin. Upper wall comprising brown cells of textura angularis, radiating in slightly irregular, but parallel lines from center to the outer rim. Hamathecium comprising 2 μm wide, branched pseudoparaphyses, asci inclined towards the central ostiole. Asci 8-spored, bitunicate, fissitunicate, cylindrical to cylindric-clavate, short pedicellate, apically rounded, with an ocular chamber. Ascospores 1–2-seriate, hyaline, 1-septum, fusiform or narrowly fusiform, rounded ends or with sub papillate ends, basal cell subconical, with or without appendages and guttules, smooth-walled. Asexual morph: Undetermined (Ariyawansa et al. 2015; Tennakoon et al. 2023).

Notes: Ariyawansa et al. (2015) introduced Tumidispora with the type species T. shoreae. This genus is morphologically similar to Microthyrium in having flattened, ostiolate thyriothecia with an upper wall comprising radially arranged cells, hyaline, 1-septum ascospores (Ariyawansa et al. 2015). However, it differs from Microthyrium in lacking superficial hyphae, and ascospores with appendages (Hongsanan et al. 2020a). It is also similar to Paramicrothyrium but differs by a distinct central ostiole surrounding a darkened ring and the shape of ascospores (Ariyawansa et al. 2015; Tennakoon et al. 2023).

Type species: Tumidispora shoreae Hongsanan & K.D. Hyde, Fungal Diversity 75: 95 (2015).

Other accepted species: Species Fungorum – search Tumidispora.

 

References

Ariyawansa HA, Hyde KD, Jayasiri SC et al 2015 – Fungal diversity notes 111–252 taxonomic and phylogenetic contributions to fungal taxa. Fungal Divers 75:27–274.

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.     

Tennakoon DS, Hongsanan S, De Silva N et al 2023 – Molecular phylogeny and morphological characterization of Paramicrothyrium bambusae sp. nov. and Tumidispora thailandica sp. nov. from leaf litter. Phytotaxa 578:112–124.

 

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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