Misturatosphaeria
Misturatosphaeria Mugambi & Huhndorf, Stud. Mycol. 64: 108 (2009).
Index Fungorum number: IF 515583; Facesoffungi number: FoF 00831, 11 morphological species (Species Fungorum, 2022), 3 species with molecular data.
Saprobic on woody branches. Sexual morph: Ascomata solitary or aggregated, superficial, coriaceous to carbonaceous, dark brown to black, pyriform or globose to subglobose, ostiolate, ostiolar area orange or lighter. Ostiole central, rounded, papillate. Peridium comprising several layers of cells, outer layers of dark-brown, compressed cells of textura angularis; becoming thin-walled and hyaline towards the inner region. Hamathecium comprising 1–2μm wide, numerous, septate, branching, anastomosing pseudoparaphyses, embedded in a gelatinous matrix. Asci 8- spored, bitunicate, fissitunicate, cylindrical-clavate, long pedicellate, apically rounded, with an occular chamber. Ascospores uni to bi-seriate, partially overlapping, brown to dark brown, fusiform, often slightly curved, 1–3-septate, one of the central cells is often wider than the others, slightly constricted at the central septum, rough-walled, with or without a mucilaginous sheath. Asexual morph: Unknown (adapted from Thambugala et al., 2015).
Type species: Misturatosphaeria aurantiacinotata Mugambi & Huhndorf
Notes: Misturatosphaeria is characterised by pyriform or globose to subglobose ascomata, fissitunicate, cylindrical-clavate asci and brown to dark brown, fusiform ascospores. In the phylogenetic analyses of Thambugala et al. (2015) based on LSU, SSU, ITS and TEF-1 sequence data, Misturatosphaeria species grouped in several subclades in Floricolaceae and were accommodated in several new genera. Misturatosphaeria claviformis was transferred to a new genus Neocurreya. Other Misturatosphaeria taxa except Misturatosphaeria aurantiinotata and M. uniseptata were separated in the new genera Asymmetrispora, Aurantiascoma, Magnibotryascoma, Pseudoaurantiascoma and Pseudomisturatosphaeria based on morphology and phylogeny. Jaklitsch et al. (2016b) did not agree with the concept proposed by Thambugala et al. (2015) and synonymized all Misturatosphaeria species under Teichospora and designated T. trabicola as the type species. The authors also revealed that Misturatosphaeria and Floricola are synonyms of Teichospora. Tennakoon et al. (2020) dismissed the broad concept of Teichospora and accepted Misturatosphaeria as a distinct genus in Teichosporaceae based on morphology and phylogenetic analyses of ITS, LSU, SSU, TEF-1 and RPB2 sequence data. Misturatosphaeria differs from Teichospora in having long pedicellate asci, initially hyaline, brown to dark brown, fusiform, 3-septate ascospores surrounded by a mucilaginous sheath when immature while Teichospora has brown and muriform, ellipsoid to clavate ascospores lacking a mucilaginous sheath (Jaklitsch et al. 2016b, Tennakoon et al. 2020). Misturatosphaeria is morphologically and phylogenetically a distinct genus in Teichosporaceae. Molecular markers available for Misturatosphaeria are ITS, LSU, SSU, TEF-1 and RPB2.
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