Cytostagonospora
Cytostagonospora Bubák, Annls mycol. 14(3/4): 150 (1916)
Index Fungorum, Facesoffungi number, MycoBank, GenBank Fig 1
Classification: Mycosphaerellaceae, Mycosphaerellales, Dothideomycetes, Ascomycota, Fungi
Saprobic on the host plant. The sexual morph is undetermined. The asexual morph is characterised by immersed pycnidial conidiomata, which are dark brown to black, amphigenous, separate, unilocular, glabrous, clypeate and globose. The ostiole is circular, depressed, papillate to shortly rostrate, situated within the clypeus and located in the center. The pycnidial wall is comprised of textura globulosa, thin-walled, dark brown cells in the basal of the wall. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells are holoblastic, determinate, ampuliform to lageniform, hyaline, and smooth-walled. Conidia are hyaline, thin and smooth-walled, eguttulate, filiform, 0–2-septate, not constricted at septa, apex obtuse and base truncate (Bubák 1916, Sutton 1980, Li et al. 2020).
Type species: Cytostagonospora photiniicola Bubák [as 'photinicola'], Annls mycol. 14(3/4): 150 (1916)
Notes: Cytostagonospora was introduced by Bubák (1916) based on C. photiniicola as the type species. Von Arx (1983) considered Cytostagonospora as a synonym of Septoria. However, Sutton (1980) introduced Cytostagonospora as a separate genus. Quaedvlieg et al. (2013) confirmed that Cytostagonospora belongs to Mycosphaerellaceae (Capnodiales) based on tef-1α, tub2, rpb2, LSU and ITS datasets and the morphology of C. martiniana (Quaedvlieg et al. 2013). Species Fungorum (May 2024) lists two species (C. photiniicola and C. traversoana) in Cytostagonospora however, MycoBank (May 2024) accepts five species. Molecular data are only available for C. martiniana in NCBI (May 2024). The updated taxonomic treatment of this genus is Mycosphaerellaceae, in Mycosphaerellales (Dothideomycetes) (Wijayawardene et al. 2022, Hyde et al. 2024).
For all accepted species: only two species are recommended in Species Fungorum, search Cytostagonospora.
Figure 1 – Cytostagonospora photiniicola (redrawn from Sutton 1980) a Conidia. b Vertical section of conidioma. c Conidiogenous cells and developing conidia. Scale bars: a = 10 μm, b = 1300 μm, c = 10 μm. (Originally published in Li et al. (2020) and republished with authority)
References
Bubák F. 1916 – Achter Beitrag zur Pilzflora von Tirol. Annales Mycologici 14(3-4), 145–158.
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.
Sutton BC. 1980 – The Coelomycetes. Fungi imperfecti with pycnidia, acervuli and stromata. Commonwealth Mycological Institute, Kew.
Von Arx JA. 1983 – Mycosphaerella and its anamorphs. Proc K Nederl Wet C 86, 15–54.
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.
Entry by Chao Chen1,2,3
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-December 30.
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