Dothideales » Saccotheciaceae » Pseudosydowia

Pseudosydowia eucalypti

Pseudosydowia eucalypti (Verwoerd & du Plessis) Thambug. & K.D. Hyde, in Thambugala et al., Fungal Diversity 68: 140 (2014).

 = Sphaerulina eucalypti Verwoerd & du Plessis, S. Afr. J. Sci. 28: 296 (1931).

            Index Fungorum number: IF 550734; Facesoffungi number: FoF 00106, Fig. 1

Description: see Crous et al. (2003); Cheewangkoon et al. (2009).

Material examined: see Crous et al. (2003); Cheewangkoon et al. (2009).

Fig. 1 Pseudosydowia eucalypti (CPC 14927 = CPC 14928, 14929, holotype, re-drawn from Fig. 25 in Cheewangkoon et al. 2009). a Disease symptoms. b Conidia of Selenophoma morph. c Colony on pine needle agar. d Conidia of coniothyrium-like synasexual morph. e Conidiogenous cell. f Asci and ascospores. Scale bars: b = 20 μm, c = 100 μm, d = 20 μm, e, f = 40 μm.

Importance and distribution

Pseudosydowia comprises two species causing leaf spots on Eucalyptus species (Myrtaceae) in Australia (New South Wales) and Southern Africa.


Quarantine significance

Pseudosydowia is considered as an important quarantine pathogen that may cause damage to Eucalyptus species in the tropical and temperate regions.



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. 2003 – The value of ascospore septation in separating Mycosphaerella from Sphaerulina in the Dothideales: a Saccardoan myth? Sydowia 55, 136–152. f

Crous PW, Wingfield MJ, Cheewangkoon R, Carnegie AJ et al. 2019 – Foliar pathogens of eucalypts. Studies in Mycology 94, 125–298.

Thambugala K, Ariyawansa H, Li Y, Boonmee S et al. 2014 – Dothideales. Fungal diversity 68, 105–158.

Verwoerd L, Du Plessis SL. 1931 – Descriptions of some new species of South African fungi and species not previously recorded from South Africa. III. South African Journal of Science 28, 290–297.


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