Stictosepta
Stictosepta Petr., Sydowia 17(1-6): 230 (1964) [1963]
Citation when using this entry, Chen C. et al. in prep. – An updated monograph of Coelomycetes, Mycosphere
Index Fungorum, Facesoffungi number, MycoBank, GenBank
Classification: Mycosphaerellaceae, Mycosphaerellales, Dothideomycetes, Ascomycota, Fungi
Saprobic on host plants. The sexual morph is undetermined. The asexual morph is characterised by immersed pycnidial conidiomata, which are unilocular, papillate, globose to collabent, convoluted and glabrous. The ostiole is circular, single and located in the center. The pycnidial wall is comprised of textura intricata, with thin-walled, and hyaline cells. Conidiophores are hyaline, irregular, branched, and septate. Conidiogenous cells are holoblastic, sympodial or synchronous, integrated, indeterminate, cylindrical to irregular, hyaline, thin and smooth-walled, with usually two small, apical, unthickened and slightly protuberant conidiogenous loci. Conidia are hyaline, holoblastic, cylindrical to filiform, straight or curved, smooth-walled, guttulate, septate, with slightly constricted at the septa, apex obtuse and base slightly truncate (Petrak 1964, Sutton 1980, Li et al. 2020).
Type species: Stictosepta cupularis Petr., Sydowia 17(1-6): 231 (1964)
Notes: Stictosepta was introduced by Petrak (1964) based on S. cupularis as the type species. Stictosepta has similar pycnidial conidiomata and multi-septate hyaline conidia with Septoria, however, differs in its sympodial conidiogenous cells and the presence of conidiophores (Quaedvlieg et al. 2013). Currently, there is one Stictosepta species listed in Species Fungorum (September 2024) and no sequence data are available for this species GenBank (September 2024). Therefore, more collections are necessary to provide molecular data. Wijayawardene et al. (2022) accepted Stictosepta belongs to Mycosphaerellaceae (Mycosphaerellales) based on morphological characters. The updated taxonomic treatment of this genus is Mycosphaerellaceae, in Mycosphaerellales (Dothideomycetes) (Wijayawardene et al. 2022).
For all accepted species: see Species Fungorum, and search Stictosepta.
Stictosepta cupularis (redrawn from Sutton 1980) a Conidia. b Vertical section of conidioma. c, d Conidiophores, conidiogenous cells and developing conidia. Scale bars: a = 10 μm, b = 100 μm, d = 10 μm (Originally published in Li et al. (2020) and republished with authority)
References
Li WJ, McKenzie EH, Liu JK, Bhat DJ et al. 2020 – Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100, 279–801.
Quaedvlieg W, Barreto RW, Alfenas AC, Barreto RW et al. 2013 – Sizing up Septoria. Studies in Mycology 75, 307–390.
Petrak F. 1963 – Stictosepta nov. gen., eine neue Gattung der scolecosporen Parasphaeropsideen. Sydowia 17, 230–233.
Sutton BC. 1980 – The Coelomycetes. Fungi imperfecti with pycnidia, acervuli and stromata. Commonwealth Mycological Institute, Kew.
Wijayawardene NN, Hyde KD, Dai DQ, Sánchez-García ML et al. 2022 – Outline of Fungi and fungus-like taxa–2021. Mycosphere 13(1), 53–453.
Edited by Kevin D. Hyde1,3 & Ishara S. Manawasinghe1
1Innovative Institute for Plant Health, College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, Guangdong, P.R. China.
2Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand.
3Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand; School of Science, Mae Fah Luang University, Chiang Rai, Thailand.
Published online 2024-September 30.
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