Phragmaspidium
Phragmaspidium Bat., Publicações Inst. Micol. Recife 260: 109 (1960).
Index Fungorum number: IF 4018; Facesoffungi number: FoF 12392, 3 morphological species (Species Fungorum 2022), no molecular data available.
Epiphytic on leaves, superficial mycelium lacking. Sexual morph: Thyriothecia gregarious, circular, or some solitary, brown to black-brown, coriaceous, with prominent and darkened, raised, circular, central ostiole. Upper wall comprising neatly arranged radiating cells, basal layer poorly developed. Hamathecium comprising asci inclined towards the central ostiole, pseudoparaphyses lacking. Asci 8-spored, bitunicate, obclavate to cylindrical, apedicellate, lacking an obvious ocular chamber. Ascospores overlapping seriate, fusiform to clavate, with larger region above central septum, smooth-walled. Asexual morph: Unknown (adapted from Wu et al. 2011).
Type species: Phragmaspidium corruscans (Rehm) Bat.
Notes: Batista (1960) placed Phragmaspidium in Microthyriaceae. Later two other species P. manaosense and P. viniferae were added (Batista 1960). Lumbsch and Huhndorf (2010) accepted Phragmaspidium in Microthyriaceae. Wu et al. (2011) could not locate the generic type and followed Rehm (1913) treating Phragmaspidium in Micropeltidaceae based on the ascomata features and small, 4-celled ascospores. Wu et al. (2014) examined the type specimen of P. corruscans and excluded Phragmaspidium from Microthyriaceae based on the lack of a well-developed base, the upper wall of thyriothecia which consist of cells radiating outwardly in parallel rows from the central raised papillate ostiole, and fusiform to clavate ascospores. Molecular data is lacking. Kirk et al. (2013) and Wijayawardene et al. (2017, 2020) accepted Phragmaspidium in Dothideomycetes genera incertae sedis. Fresh collections with DNA sequence data are needed to confirm the systematic position of Phragmaspidium.
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