Fungalpedia – Note 2067, Diademaceae

 

Diademaceae. Shoemaker & C.E. Babc.

Citation when using this data: Hongsanan S et al. 2020 – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank

Classification: Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

 

Parasitic or saprobic on decaying stems and leaves. Colonies dark brown to black with subepidermal or subcuticular and later become superficial. Sexual morph: Ascomata subepidermal or subcuticular and later become superficial, dark brown to black, globose, opening via a flat, circular lid. Peridium consisting of small, pigmented, thick-walled cells of textura angularis. Hamathecium comprising dense, cellular pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, clavate or ellipsoidal, with short, broad, furcate pedicel, apically rounded with an ocular chamber. Ascospores 2-seriate, fusiform, brown, with 3 or more transverse septa, with or without longitudinal septa, applanate or rarely terete, with a thick sheath most of the time. Asexual morph: Undetermined.

Notes – Diademaceae was introduced by Shoemaker & Babcock (1992) based on the ascomata characteristic of opening by a flat, circular lid, and comprised five genera (Clathrospora, Comoclathris, Diadema, Diademosa and Macrospora) (Shoemaker & Babcock 1992). Later Clathrospora, Comoclathris, Diademosa and Macrospora were transferred to Pleosporaceae (Kruys et al. 2006, Lumbsch & Huhndorf 2010, Ariyawansa et al. 2014a). Wijayawardene et al. (2018) accepted two genera Diadema and Diademosa in this family. We agree with Ariyawansa et al. (2014a) to transfer Diademosa to Pleosporaceae. This genus needs recollecting to confirm its placement with DNA sequence data. In this study, we accept only Diadema in Diademaceae.

 

Type genus: Diadema Shoemaker & C.E. Babc.

Other accepted species: Species Fungorum – search Diademaceae.

 

References

Ariyawansa HA, Phookamsak R, Tibpromma S, Kang JC, Hyde KD. 2014a – A Molecular and Morphological Reassessment of Diademaceae. Scientific World Journal 1–11.

Kruys Å, Eriksson OE, Wedin M. 2006 – Phylogenetic relationships of coprophilous Pleosporales (Dothideomycetes, Ascomycota), and the classification of some bitunicate taxa of unknown position. Mycological Research 110, 527–536.

Lumbsch HT, Huhndorf SM. 2010 – Outline of Ascomycota 2009. Myconet 14, 1–64.

Shoemaker RA, Babcock CE. 1992 – Applanodictyosporous Pleosporales: Clathrospora, Comoclathris, Graphyllium, Macrospora, and Platysporoides. Canadian Journal of Botany 70, 1617–1658.

Wijayawardene NN, Hyde KD, Lumbsch HT, Liu JK et al. 2018 – Outline of Ascomycota: 2017. Fungal Diversity 88, 167–263.

 

Entry by

Sinang Hongsanan, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Science and Oceanography, Shenzhen University, Shenzhen 518060, People’s Republic of China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50002, Thailand

 

Published online 23 March 2026

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