Setoseptoria
Setoseptoria Quaedvl., Verkley & Crous, Studies in Mycology 75: 382 (2013).
Index Fungorum number: IF 804462; Facesoffungi number: FoF 08261, 7 morphological species (Species Fungorum 2022), 6 species with molecular data.
Pathogenic on leaves. Sexual morph: Unknown. Asexual morph: Conidiomata pycnidial, brown, immersed, globose with central ostiole, somewhat papillate, apical erumpent part at times with brown, verruculose to warty setae; wall of 6–8 layers of brown textura angularis; inner layer of 6–10 layers of hyaline textura angularis. Conidiophores lining the inner cavity, reduced to conidiogenous cells, or with one supporting cell. Conidiogenous cells hyaline, smooth, subcylindrical to doliiform; apical region with several inconspicuous percurrent proliferations, or with periclinal thickening; collarette inconspicuous, or prominent, flared. Conidia hyaline, smooth, becoming somewhat olivaceous and verruculose in older cultures, subcylindrical, tapering in apical part to obtuse or subobtuse apex, base truncate, transversely euseptate, straight to somewhat curved, mostly with one large central guttule per cell, older conidia becoming constricted at septa, disarticulating into phragmospores (adapted from Quaedvlieg et al. 2013).
Type species: Setoseptoria phragmitis Quaedvl., Verkley & Crous
Notes: Setoseptoria is characterised by being pycnidial, with brown, immersed, globose conidiomata, hyaline, smooth, subcylindrical to doliiform conidiogenous cells, and hyaline, smooth, subcylindrical conidia. The sexual morph is unknown. Setoseptoria resembles Dearnessia but the latter has conidiogenous cells with prominent percurrent proliferation, and hyaline, smooth, conidia with older conidia becoming constricted at septa, disarticulating into phragmospores. Several authors added new species to Setoseptoria (Tanaka et al. 2015, Hyde et al. 2017, Wanasinghe et al. 2018). Setoseptoria is morphologically and phylogenetically a distinct genus in Lentitheciaceae. Molecular markers available for Setoseptoria are LSU, SSU, ITS, TEF1 and RPB2.
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