Fungalpedia – Note 2268, Sydowia

 

Sydowia Bres.

Citation when using this data: Hongsanan S et al. 2020 – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank.

Classification: Dothioraceae, Dothideales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi

Sydowia was transferred to Dothioraceae by Luttrell (1973) mainly based on its phragmosprous ascospores. von Arx & Müller (1975) placed this genus in Dothideaceae based on morphology, unilocular stromata and ascospores with transverse septa (Thambugala et al. 2014a). Multi-gene phylogenetic analyses based on S. polyspora (Schoch et al. 2006) placed Sydowia in Dothioraceae. However, Thambugala et al. (2014a) accommodated Sydowia in Dothideaceae pending molecular data for the type species. Sydowia eucalypti (Sphaerulina eucalypti) was introduced by Crous et al. (2003b) with its coniothyrium-like and hormonema-like synasexual morphs and Selenophoma asexual state in culture. Following a phylogenetic study, Thambugala et al. (2014a) introduced a new genus, Pseudosydowia to accommodate Sydowia eucalypti in Saccotheciaceae, Dothideales. Hormonema dematioides has been suggested as the asexual morph of S. polyspora (Butin 1964, Cheewangkoon et al. 2009, Thambugala et al. 2014a). Bills et al. (2004) showed S. polyspora and H. dematioides clustered in the same clade in their phylogeny analysis. In our multi-gene analysis, we confirmed the observations by Bills et al. (2004).

Type species: Sydowia gregaria Bres., Hedwigia 34(Beibl.): (66) (1895).

Other accepted species: Species Fungorum – search Sydowia.

 

References

Bills GF, Collado J, Ruibal C, Peláez F, Platas G. 2004 – Hormonema carpetanum sp. nov., a new lineage of dothideaceous black yeasts from Spain. Studies in Mycology 50, 149–157.

Butin H. 1964 – Überzwei Nebenfruchtformen von Sydowia polyspora (Gref.et v. Tav.) Müller. Sydowia 17, 114–118.

Cheewangkoon R, Groenewald JZ, Summerell BA, Hyde KD et al. 2009 – Myrtaceae, a cache of fungal biodiversity. Persoonia 23, 55–85.

Crous PW, Groenewald JZ, Wingfield MJ, Aptroot A. 2003b – The value of ascospore septation in separating Mycosphaerella from Sphaerulina in the Dothideales: a Saccardoan myth? Sydowia 55, 136–152.

Luttrell ES. 1973 – Loculoascomycetes. In: Ainsworth GC, Sparrow FK, Sussman AS (eds), The fungi. An advanced treatise, a taxonomic review with keys: ascomycetes and fungi imperfecti. Academic Press, New York, pp 135–219.

Schoch CL, Shoemaker RA, Seifert KA, Hambleton S et al. 2006 – A multigene phylogeny of the Dothideomycetes using four nuclear loci. Mycologia 98 1041–1052.

Thambugala KM, Ariyawansa HA, Li YM, Boonmee S et al. 2014a – Dothideales. Fungal Diversity 68, 105–158.

von Arx JA, Müller E. 1975 – A re-evaluation of the bitunicate Ascomycetes with keys to families and genera. Studies in Mycology 9, 1–159.

 

Entry by

Sinang Hongsanan, Guangdong Provincial Key Laboratory for Plant Epigenetics, Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Science and Oceanography, Shenzhen University, Shenzhen 518060, People’s Republic of China, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50002, Thailand 

 

Published online 10 April 2026

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