Fungalpedia – Note 816, Spinulosphaeria
Spinulosphaeria Sivan.
Citation when using this data: Huang SK et al. 2021 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Chaetosphaerellaceae, Coronophorales, Sordariomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on decayed wood. Sexual morph: Subiculum lacking or extensive, composed of densely clustered, brown to dark brown, septate, branched hyphae. Ascomata superficial, usually sitting on a subiculum, scattered to gregarious, black, with metallic iridescence, turbinate, conical to ovoidal, tuberculate, collapsing when dry, glabrous or surrounded with black, short, tooth-like, usually furcate, spinose ornaments, lacking ostioles, with Quellkörper or not. Peridium carbonaceous or membranaceous, composed of brown to hyaline cells of textura angularis to textura prismatica, Munk pore absent or present. Paraphyses septate, longer than asci, filiform or broad and constricted at the septa, evanescent. Asci 8-spored, unitunicate, clavate, apical ring distinct or indistinct, long pedicellate, evanescent. Ascospores oblong to ellipsoidal, smooth-walled or verrucose, hyaline when young, becoming brown, 1-septate, with large mucilaginous sheath or not. Asexual morph: Undetermined (adapted from Sivanesan 1974, Mugambi & Huhndorf 2010).
Notes – Spinulosphaeria was placed in Coronophorales and typified by S. thaxteri in having turbinate ascomata covered by tooth-like spines, Quellkörper present and ellipsoidal ascospores without sheath (Sivanesan 1974). Subsequently, Mugambi & Huhndorf (2010) introduced a second species, S. nuda, and analyzed its LSU sequence data. However, S. nuda is characterized by glabrous ascomata without Quellkörper and ellipsoidal ascospores with large glutinous sheath, which are different from S. thaxteri. Spinulosphaeria is accepted as a member of Chaetosphaerellaceae based on molecular information of S. nuda (Maharachchikumbura et al. 2015, 2016, Hyde et al. 2017). In this study, Spinulosphaeria is basal to Chaetosphaerella and Crassochaeta in Chaetosphaerellaceae (0.92BY).
Type species: Spinulosphaeria thaxteri (Pat.) Sivan., Trans. Br. mycol. Soc. 62(1): 36 (1974).
Other accepted species: Species Fungorum – search Spinulosphaeria.
Figure 1 – Spinulosphaeria thaxteri: a–f, h–n (FH-16-10965, holotype); g (redrawn from Sivanesan 1974). a Material label. b–c Turbinate ascomata on wood. d Tuberculate ascoma (arrow indicates the enlarged tooth-like spine). e Ascoma cross section. f Peridium. g Sectional view of ascoma with spines. h–j Asci. k–n Ascospores. Scale bars: b–c = 500 µm, d–e, g = 200 µm, f = 100 µm, h–j = 20 µm, k = 10 µm, l–n = 5 µm.
References
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