Fungalpedia – Note 726, Dictyothyrium
Dictyothyrium. 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
Epiphytic on living leaves as black dots. Superficial hyphae hyaline and indistinct. Sexual morph: Thyriothecia superficial, solitary, gregarious, subdense, black, flattened, circular, dimidiate, with a central ostiole. Upper wall blackish green, membranous, comprising overlapping, compact, pseudoparenchymatous hyphae with textura epidermoidea, lacking a basal plate. Hamathecium lacking pseudoparaphyses. Asci 8-spored, hyaline, bitunicate, cylindrical to fusoid, with short pedicel. Ascospores overlapping, 2-seriate, hyaline, cylindrical to long clavate, hyaline, 2-septate, slightly constricted at septa. Asexual morph: Undetermined (Zeng et al. 2019).
Notes: Theissen (1912) introduced Dictyothyrium typifying Dictyothyrium chalybeum as the type species. Zeng et al. (2019) studied holotype (S F12647) and mentioned the septation of ascospores and guttules are different from the original protologue. However, Dictyothyrium differs from Micropeltis by paraphyses and the number of septa in the ascospores (Zeng et al. 2019).
Type species: Dictyothyrium chalybeum (Rehm) Theiss. [as ‘chalybaeum’], Öst. bot. Z. 62: 277 (1912).
Other accepted species: Species Fungorum – search Dictyothyrium.
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