Fungalpedia – Note 725, Dictyothyrina
Dictyothyrina. Theiss.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank.
Classification: Micropeltidaceae, Microthyriales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Colonies epiphytic on living leaves appear as black dots. Superficial hyphae hyaline and indistinct. Sexual morph: Thyriothecia superficial, solitary, gregarious, subdense, black to greenish blue, flattened, circular, dimidiate, with a central ostiole. Upper wall blackish green, membranous, comprising overlapping, compact, pseudoparenchymatous hyphae with cells of textura intricata, lack of basal layer. Hamathecium comprising of hyaline, filiform pseudoparaphyses embedded in a gelatinous matrix. Asci 8-spored, bitunicate, cylindrical, short pedicel or absent. Ascospores overlapping, aseptate, 2-seriate, hyaline, cylindrical to ellipsoid, verrucose. Asexual morph: Undetermined (Zeng et al. 2019).
Notes: Dictyothyrina was introduced by Theissen (1913b) and initially placed in Hemisphaeriaceae (Hemisphaeriales). It differs from other genera in this family in having aseptate ascospores. However, Dictyothyrina shares greenish, pseudoparenchymatous upper wall which resembles this family and needs molecular data to confirm its placement in Micropeltidaceae (Zeng et al. 2019).
Type species: Dictyothyrina fecunda (Sacc.) Theiss., Annls mycol. 11(5): 469 (1914)
Other accepted species: Species Fungorum – search Dictyothyrina.
References
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