Dothideales » Saccotheciaceae

Pseudoseptoria

Pseudoseptoria Speg., Anal. Mus. nac. B. Aires, Ser. 3 13: 388 (1910) [1911]

Lunospora Frandsen, Meddr Plantepatol. Afd. Kgl. Veterin. Landb., (Københaven) 26: 70 (1943)

Index Fungorum: IF 9614, Facesoffungi number: FoF 00134 , MycoBank: MB 9614

Classification: Saccotheciaceae, Dothideales, Dothideomycetes, Ascomycota, Fungi

 

Saprobic or parasitic on the host plant. The sexual morph is undetermined. The asexual morph is characterised by immersed to erumpent conidiomata, which are pycnidial or linearly aggregated, brown to dark brown, scattered to gregarious, globose and unilocular. The ostiole is circular, single and located in the center. The pycnidial wall is comprised of cells of textura angularis, which is thin-walled and pale brown. Conidiophores are reduced to conidiogenous cells. Conidiogenous cells are enteroblastic, determinate or indeterminate, subcylindrical to ampulliform with a prominent cylindrical annellate papilla, and with hyaline smooth wall. Conidia are hyaline, thin- and smooth-walled, falcate or fusiform, aseptate, guttulate and tapered at each end (Sutton 1980, Li et al. 2020).

 

Type species: Pseudoseptoria donacis (Pass.) B. Sutton, Mycol. Pap. 141: 169 (1977)

Lunospora oxyspora (Penz. & Sacc.) Frandsen, Meddr Plantepatol. Afd. Kgl. Veterin. Landb., (Københaven) 26: 71 (1943)

Pseudoseptoria donacicola Speg., Anal. Mus. nac. B. Aires, Ser. 3 13: 388 (1910) [1911]

Rhabdospora donacis (Pass.) Kuntze, Revis. gen. pl. (Leipzig) 3(3): 511 (1898)

Rhabdospora oxyspora (Penz. & Sacc.) Kuntze, Revis. gen. pl. (Leipzig) 3(3): 512 (1898)

Selenophoma donacicola (Speg.) Luc, Revue Mycol., Paris 18(Suppl. Colon. no. 2): 100 (1953)

Selenophoma donacis (Pass.) R. Sprague & Aar.G. Johnson, Mycologia 32(3): 415 (1940)

Selenophoma donacis var. linearis R. Sprague & Aar.G. Johnson, Oregon St. Monogr., Bot. 10: 25 (1950)

Selenophoma oxyspora (Penz. & Sacc.) Lavrov, Trud. tomsk. gos. Univ. Kuibysheva, Ser. biol. 110(4): 98 (1951)

Septoria donacis Pass., Atti Soc. Crittogam. Ital., Sér. 2 2: 44 (1879)

Septoria oxyspora Penz. & Sacc., Atti Inst. Veneto Sci. lett., ed Arti, Sér. 6 2(5): 652 (1884)

 

Notes: Pseudoseptoria was introduced by Spegazzini (1910) based on P. donacis as the type species. Sutton (1980) revised the genus and accepted five species. Quaedvlieg et al. (2013) introduced two new species, P. collariana and P. obscura based on morphology which is currently accepted, and placed them in Dothioraceae, based on molecular phylogeny. Wijayawardene et al. (2018) accepted Pseudoseptoria in Saccotheciaceae. Currently, there are eight species listed in Pseudoseptoria in Species Fungorum (May, 2024). However, molecular data are rare in Pseudoseptoria. The sequence data of only three species (P. collariana, P. donacis and P. obscura) are available in GenBank (May, 2024). The updated taxonomic treatment of this genus is Saccotheciaceae, in Dothideales (Dothideomycete) (Wijayawardene et al. 2022).

For all accepted species: search in Species Fungorum Pseudoseptoria.

 

 

 

a–b Pseudoseptoria donacis, c P. stomaticola (redrawn from Sutton 1980) a Conidia. b Conidiogenous cells and developing conidia. c Vertical section of conidioma. Scale bars: a–b = 10 μm, c = 100 μm. (a–b Originally published in Li et al. (2020) and republished with authority, c redrawn by Chao Chen)

 

References

Spegazzini C (1910) Mycetes argentinenses (Series V). Anales del Museo Nacional de Buenos Aires 20(13), 329–467.

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.

Wijayawardene NN, Hyde KD, Lumbsch HT, Liu JK et al. (2018) Outline of ascomycota: 2017. Fungal diversity 88, 167–263.

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 Chen^1,2,3

Edited by Kevin D. Hyde^1,3 & Ishara S. Manawasinghe¹

 

¹Innovative Institute for Plant Health, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China, Ministry of Agriculture and Rural Affairs, Zhongkai University of Agriculture and Engineering, Guangzhou, People’s Republic of 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-May 30.

 

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