Polysporidiella
Polysporidiella Petr., Sydowia 14(1-6): 355 (1960).
Index Fungorum number: IF 4321; Facesoffungi number: FoF 12425, 1 morphological species (Species Fungorum 2022), no molecular data available.
Saprobic on petiole of Astragalus spp. Sexual morph: Ascomata loosely and irregularly scattered, often solitary, immersed to erumpent, globose or broadly ellipsoid, black, depressed, pulvinate, without a distinct ostiole. Peridium composed a single layer of heavily or lightly pigmented, large, dark brown, irregularly rounded or angular cells. Hamathecium lacking pseudoparaphyses, with 2 asci per ascomata. Asci polysporous, bitunicate, fissitunicate, ellipsoidal to narrowly clavate, subsessile, short pedicellate, apical region rounded with a minute ocular chamber. Ascospores crowded overlapping, ellipsoidal or ovoid, with broadly rounded ends, uniseptate, not constricted at the septum, smooth-walled, becoming brown at maturity. Asexual morph: Unknown (adapted from Thambugala et al. 2014).
Type species: Polysporidiella iranica Petr.
Notes: Polysporidiella is characterised by immersed to erumpent, globose or broadly ellipsoid ascomata, polysporous, bitunicate, fissitunicate asci and ellipsoidal or ovoid ascospores with broadly rounded ends. Petrak firstly considered P. iranica as Discosphaerina euganea Petr. and later treated it as a new genus. Lumbsch and Huhndorf (2010) and Kirk et al. (2013) accepted Polysporidiella in Venturiaceae. Thambugala et al. (2014) examined the type specimen P. iranica from W and referred Polysporidiella to Dothideomycetes genera incertae sedis based on doubtful morphological characters. Molecular data is lacking. Fresh collections with DNA sequence data are needed to confirm the systematic position of Polysporidiella.
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