Fungalpedia – Note 863, Trichosphaerella
Trichosphaerella. E. Bommer, M. Rousseau & Sacc.
Citation when using this data: Huang SK et al. 2021 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank., Fig 1
Classification: Niessliaceae, Hypocreales, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
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 (adapted from Müller & Samuels 1982, Samuels 1983, Samuels & Barr 1997).
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 the T. ceratophora which is sister to Hyaloseta nnolinae in Niessliaceae. In this study, 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.
Type species: Trichosphaerella decipiens Sacc., E. Bommer & M. Rousseau, in Bommer & Rousseau, Bull. Soc. R. Bot. Belg. 29(no. 1): 261 (1890)
Other accepted species: Species Fungorum – search Trichosphaerella.
Figure 1 – Trichosphaerella decipiens (= Bresadolella aurea): b–c, e–f (S-F10868, isotype); a, d (S-F10869, isotype); g–i (redrawn from Samuels & Barr 1997). a–b Squashed ascoma. c Seta. d–g Asci (g ascoconidia in asci). h Hyphae of subiculum. i Conidiophores and conidia. – Scale bars: a = 200 µm, b = 100 µm, c = 50 µm, d–e = 20 µm, f–i = 10 µm.
References
Müller E, Samuels GJ. 1982 – Anamorphs of pyrenomycetous Ascomycetes. I. Rhamphoria Niessel and Trichosphaerella Bommer, Rousseau & Saccardo. In Sydowia: Annales mycologici 35, 143–149.
von Höhnel F. 1903 – Mycologische Fragmente (Fortsetzung). Annales Mycologici 1(6), 522–534.
Entry by
Shi-Ke Huang, State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China, The Engineering Research Center of Southwest Bio-Pharmaceutical Resources, Ministry of Education, Guizhou University, Guiyang 550025, Guizhou Province, China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand, The Mushroom Research Centre, Guizhou University, Guiyang 550025, China
Published online 14 September 2021