Fungalpedia – Note 559, Equiseticola
Equiseticola Abdelsalam, Tibpromma, Wanas. & K.D. Hyde
Citation when using this data: Zhang et al. 2025 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Classification: Phaeosphaeriaceae, Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
The monotypic genus Equiseticola was introduced in Phaeosphaeriaceae (Pleosporales, Dothideomycetes) by Abd-Elsalam et al. (2016) based on phylogenetic analyses of combined LSU, SSU and ITS sequence data. Phylogenetically, Equiseticola is closely related to Ophiosphaerella in Phaeosphaeriaceae, but they are distinct in morphology (Abd-Elsalam et al. 2016). Equiseticola has a long, acute or knob-like pedicel, a well-developed ocular chamber and fusiform ascospores, while Ophiosphaerella has short pedicellate asci, an indistinct ocular chamber, and fasciculate ascospores. The type species, E. fusispora, was isolated from Equisetum sp. in Italy. The genus is characterized by ovoid ascomata with a minute papilla, bitunicate, cylindrical asci with a long, acute or knob-like pedicel, and hyaline to yellowish to pale brown, fusiform ascospores (Abd-Elsalam et al. 2016). In this study, we introduce the second species of Equiseticola, which was also collected from Equisetum sp. (Fig. 2).
Type species: Equiseticola fusispora Abdelsalam, Tibpromma, Wanasinghe & K.D. Hyde.
Other accepted species: Species Fungorum – search Equiseticola.
Figure 1 – Equiseticola fusispora. a Section of an ascoma. b The texture of the cell wall of the peridium, showing brown to dark brown cells of textura angularis. c Pseudoparaphyses. d Ocular chamber. e Asci. f Ascospores. Scale bars: a = 50 μm, b, d, f = 5 μm, c = 2 μm, e = 20 μm. Redrawn from Abd-Elsalam et al. (2016).
Figure 2 – Equiseticola guizhouensis (HKAS 129740, holotype) a–d Appearance of ascomata on host surface. e Ostiole. f Section through an ascoma. g Peridium. h Pseudoparaphyses. i–m Asci. n–r Ascospores. s Geminated ascospore. t Pure culture from above and below. Scale bars: e–g = 50 μm, h–m = 20 μm, n–s =10 μm
References
Entry by
Jing-Yi Zhang, School of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang, 550025, People’s Republic of 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, Guizhou Key Laboratory of Agricultural Microbiology, Guizhou Academy of Agricultural Sciences, Guiyang, 550009, People’s Republic of China.
Published online 11 June 2025