Fungalpedia – Note 724, Dictyothyriella

 

Dictyothyriella. Speg.

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 epiphyllous on living leaves and appear as black dots. Superficial hyphae hyaline, indistinct. Thyriothecia superficial, solitary to gregarious, subdense, bluish green, circular, dimidiate, papillate. Upper wall bluish green, membranous, comprising overlapping, compact pseudoparenchymatous hyphae with textura epidermoidea, lack of basal layer. Hamathecium comprising of hyaline, filiform, pseudoparaphyses embedded in a gelatinous matrix. Asci 8-spored, bitunicate, clavate to fusiform, short pedicellate or sessile, ocular chamber not apparent. Ascospores overlapping, 2-seriate, hyaline, cylindrical to clavate, 2–3-septate, slightly constricted at septa, smooth-walled (Spegazzini 1924; Zeng et al. 2019).

Notes: Dictyothyriella was established by Spegazzini (1924) using a single species
D. bauhiniae. It was initially placed in Microthyriaceae and later Batista (1959) re-described and transferred Dictyothyriella to Micropeltis. Species of Dictyothyriella and Micropeltis morphologically similar in having the bluish green upper walls and filiform pseudoparaphyses, however, they differ from Micropeltis by 2–3-septate ascospores (Zeng et al. 2019).

Type species: Dictyothyriella bauhiniae (Rehm) Theiss. & Syd., Annls mycol. 15(6): 430 (1918)

Other accepted species: Species Fungorum – search Dictyothyriella.

 

References

Batista AC 1959 – Monografia dos fungos Micropeltaceae. Pub- licações. Instituto de Micologia da Universidade do Recife 56:1–519.

Spegazzini C 1924 – Relación de un paseo hasta al Cabo de Hoorn (Cabo de Hornos). Boletin de la Academia Nacional de Cien- cias en Córdoba 27:321–404.

Zeng XY, Wu HX, Hongsanan S et al 2019 – Taxonomy and the evolutionary history of Micropeltidaceae. Fungal Divers 97:393–436.

 

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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