Fungalpedia – Note 2033, Dissoconiaceae

 

Dissoconiaceae. Crous & de Hoog.

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

Index Fungorum, Facesoffungi, MycoBank, GenBank

Classification: Mycosphaerellales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

 

Saprobic, hyperparasitic on powdery mildew, pathogenic on Eucalyptus species. Mycelium internal and external, consisting of branched, septate, smooth, hyaline to pale brown hyphae. Sexual morph: Ascomata pseudothecial, immersed, globose, unilocular, papillate, ostiolate, canal periphysate. Peridium consisting of 3–4 layers, brown cells of textura angularis; inner layer of flattened, hyaline cells. Hamathecium pseudoparaphyses absent. Asci 8-spored, bitunicate. Ascospores fasciculate, ellipsoid-fusoid, hyaline, 1-septate, with or without mucoid sheath. Asexual morph: Conidiophores separate, arising from hyphae, unbranched or occasionally branched at apex, subcylindrical, subulate or lageniform to cylindrical, tapering to a bluntly rounded or truncate apex, sometimes with inflated basal cells, straight to flexuose, smooth, medium brown, 0–multi-septate. Conidiogenous cells terminal or lateral, integrated, smooth-walled, sympodially proliferating, rachis straight or flexuose, geniculate or nodose, subhyaline to brown; scars thickened or unthickened and somewhat darkened. Conidia solitary, ellipsoid to obclavate or globose, subhyaline to pale brown, 0–2-septate, smooth or verrucose, apex with or without mucoid appendage; hila somewhat darkened. Secondary conidia present or absent; developing adjacent to primary conidia, pale olivaceous to subhyaline, aseptate, pyriform; conidium discharge active or passive (photoplates of asexual can be seen in Crous & Wingfield 1996, Crous et al. 2004).

Notes – Crous et al. (2009c) studied the phylogenetic lineages within Capnodiales and established Dissoconiaceae, which included the genera Dissoconium and Ramichloridium. Li et al. (2012) introduced Pseudoveronaea in Dissoconiaceae. Uwebraunia was also accommodated in Dissoconiaceae (Li et al. 2012, Hyde et al. 2013, Quaedvlieg et al. 2014, Liu et al. 2017a). Some species in Dissoconiaceae are plant pathogens, for example, Uwebraunia dekkeri is a foliar pathogen causing leaf spots (Jackson et al. 2004), while some are commensalists associated with pathogenic species of Capnodiales.

 

Type genus: Dissoconium de Hoog, Oorschot & Hijwegen.

Other accepted species: Species Fungorum – search Dissoconiaceae.

 

References

Crous PW, Groenewald JZ, Mansilla JP, Hunter GC, Wingfield MJ. 2004 – Phylogenetic reassessment of Mycosphaerella spp. and their anamorphs occurring on Eucalyptus. Studies in Mycology 50, 195–214.

Crous PW, Schoch CL, Hyde KD, Wood AR et al. 2009c – Phylogenetic lineages in the Capnodiales. Studies in Mycology 64, 17–47.

Crous PW, Wingfield MJ. 1996 – Species of Mycosphaerella and their anamorphs associated with leaf blotch disease of Eucalyptus in South Africa. Mycologia 88, 441–458.

Hyde KD, Jones EBG, Liu J-K, Ariyawansa H et al. 2013 – Families of Dothideomycetes. Fungal Diversity 63, 1–313.

Jackson SL, Maxwell A, Neumeister-Kemp HG, Dell B, Hardy GESJ. 2004 – Infection, hyperparasitism and conidiogenesis of Mycosphaerella lateralis on Eucalyptus globulus in Western Australia. Australasian Plant Pathology 33, 49–53.

Li HY, Sun GY, Zhai XR, Batzer JC et al. 2012 – Dissoconiaceae associated with sooty blotch and flyspeck on fruits in China and the United States. Persoonia 28, 113–125.

Liu JK, Hyde KD, Jeewon R, Phillips AJ et al. 2017a – Ranking higher taxa using divergence times: a case study in Dothideomycetes. Fungal Diversity 84, 75–99.

Quaedvlieg W, Binder M, Groenewald JZ, Summerell BA et al. 2014 – Introducing the consolidated species concept to resolve species in the Teratosphaeriaceae. Persoonia 33, 1–40.

 

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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