Dissoconiaceae Crous & de Hoog, Studies in Mycology 64: 36 (2009).
MycoBank number: MB 514699; Index Fungorum nubmer: IF 514699; Facesoffungi number: FoF 06640, 36 species.
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).
Type – Dissoconium de Hoog, Oorschot & Hijwegen.
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.