Pleosporales » Pleosporales, genus incertae sedis

Setophaeosphaeria

Setophaeosphaeria Crous & Y. Zhang ter, in Crous et al., Persoonia 32: 271 (2014).

 Index Fungorum number: IF 808945; Facesoffungi number: FoF 06351, 5 morphological species (Species Fungorum 2022), 5 species with molecular data.

Pathogenic on Hemerocallis fulva L. (Hemerocallidaceae). Sexual morph: Ascomata scattered, immersed to subepidermal, uniloculate, globose, glabrous, ostiole central, somewhat papillate. Peridium composed of 2–3 layers of brown cells arranged in textura angularis. Hamathecium composed of hyaline, hyphal pseudoparaphyses. Asci 8-spored, bitunicate, narrowly ellipsoid, rostrate, short pedicellate, apically rounded with inconspicuous ocular chamber. Ascospores 2–3-seriate, fusoid to ellipsoidal, pale brown, 5-septate, enlarged at the second cell from apex, smooth-walled, with guttules and mucoid caps at each end. Asexual morph: forming in culture. Conidiomata pycnidial, scattered, erumpent with papilla, uniloculate, globose, setose, brown, ostiole central, with round to ellipsoid papilla. Conidiomata walls thin, composed of 2–3 layers, of pale brown cells, arranged in textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells ampulliform, hyaline, smooth, percurrently proliferating at the apex. Conidia subcylindrical, rounded or obtuse at the apex, base truncate, with marginal frill, hyaline, aseptate, smooth-walled, with guttules (adapted from Crous et al. 2014).

Type species: Setophaeosphaeria hemerocallidis Crous & Y. Zhang ter

Notes: Setophaeosphaeria differs from Phaeosphaeria in that the latter lacks ascomatal setae and phoma-like asexual morphs. Phylogenetically, S. hemerocallidis is closely related to Phaeosphaeria setosa, which has a phoma-like asexual morph. Setophaeosphaeria hemerocallidis differs from Phaeosphaeria setosa with S. hemerocallidis having larger ascospores. Phookamsak et al. (2014) reported that Setophaeosphaeria is polyphyletic and excluded it from Phaeosphaeriaceae. Setophaeosphaeria is currently accommodated in Pleosporales, genera incertae sedis. Molecular markers available for Setophaeosphaeria are ITS, LSU, BTUB, RPB2 and TEF-1.

 

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