Trichosphaerella E. Bommer, M. Rousseau & Sacc., in Bommer & Rousseau, Bull. Soc. R. Bot. Belg. 29(no. 1): 261 (1890)
Hypocreomycetidae, Hypocreales, Niessliaceae, Trichosphaerella
Index Fungorum number: IF 5587; 7 morphological species (Species Fungorum 2020); 1 species with sequence data.
Saprobic or parasitic on wood or stems, sometimes fungicolous. Sexual morph: Ascomata perithecial, scattered or gregarious, superficial, sometimes sitting on a subiculum, globose to subglobose, brown, membranaceous, glabrous or with brown setae, ostiolate, periphysate. Peridium composed of membranaceous, brown to hyaline cells of textura angularis to textura prismatica. Paraphyses absent. Asci 8-spored, unitunicate, cylindrical to clavate, pedicellate or sessile, apex rounded, apical ring indistinct or absent, evanescent. Ascospores uni-or bi-seriate or overlapping, hyaline, ellipsoidal to fusiform, straight or slightly curved, usually 1-septate, constricted at the septum to form ascoconidia, guttulate. Ascoconidia globose to subglobose, hyaline, smooth-walled or spinulose or verrucose, sometimes becoming red in Melzer’s reagent. Asexual morph: Hyphomycetous. Conidiophores mononematous, macronematous, hyaline, branched, straight or curved. Conidia globose to ellipsoidal, usually aseptate, hyaline, smooth-walled or verrucose (copied from Huang et al. 2021).
Type species: Trichosphaerella decipiens Sacc., E. Bommer & M. Rousseau, in Bommer & Rousseau, Bull. Soc. R. Bot. Belg. 29(no. 1): 261 (1890)
Notes: Trichosphaerella was introduced by Bommer & Rousseau (1890) for T. decipiens. von Höhnel (1903) subsequently introduced Bresadolella with B. aurea. However, Samuels & Barr (1997) treated B. aurea as a synonym of T. decipiens based on similar morphology and associated with acremonium-like fungi. Lombard et al. (2015) sequenced T. ceratophora which is sister to Hyaloseta nnolinae in Niessliaceae. In the study by Huang et al. (2021), T. ceratophora is sister to Valetoniellopsis, differing from the latter that has glabrous ascomata with ellipsoidal ascospores. However, there is no molecular data for the type T. decipiens (copied from Huang et al. 2021).
Species illustrated in this entry:
Trichosphaerella decipiens Sacc.
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