Triplosphaeria maxima
Triplosphaeria Kaz. Tanaka & K. Hiray., in Tanaka et al., Stud. Mycol. 64: 185 (2009).
Index Fungorum number: IF 515255; Facesoffungi number: FoF 06672, 4 morphological species (Species Fungorum 2022), 4 species with molecular data.
Saprobic on host. Sexual morph: Ascomata scattered to gregarious, immersed below the epidermis, subglobose, with single locule, glabrous. Beak none to short, with hyaline sparse periphyses. Ascomatal wall rim-like at sides, composed of vertically orientated rectangular to cylindrical hyaline hyphoid cells, flattened and poorly developed at the base. Pseudoparaphyses narrowly cellular, numerous, branched and anastomosed, septate. Asci fissitunicate, basal and lateral, cylindrical to clavate, rounded at the apex, short-stalked, with 8 ascospores. Ascospores narrowly fusiform to broadly fusiform with rounded ends, uniseptate, constricted at the septum, hyaline, smooth, with an entire sheath. Asexual morph: Tetraploa-like with 3 setose appendages. Conidiophores absent. Conidiogenous cells monoblastic. Conidia composed of 3 columns with pseudosepta, ovoid to obpyriform, brown, almost smooth, verrucose at the base, with 3 setose appendages at the apex (adapted from Tanaka et al. 2009).
Type species: Triplosphaeria maxima Kaz. Tanaka & K. Hiray.
Notes: Triplosphaeria is characterised by scattered to gregarious ascomata, cylindrical to clavate asci and narrowly to broadly fusiform, uniseptate ascospores. Triplosphaeria differs from Tetraploa in conidia comprising three columns and three setose appendages. Triplosphaeria is morphologically and phylogenetically a distinct genus in Tetraplosphaeriaceae. Molecular markers available for Triplosphaeria are ITS, LSU, SSU, BTUB and TEF-1.
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