Mycosphaerellales » Mycosphaerellaceae » Phloeospora

Phloeospora ulmi

Phloeospora ulmi (Fr.) Wallr., Fl. crypt. Germ. (Norimbergae) 2: 177 (1833).

Septoria ulmi Fr. [as 'Septaria'], Novit. fl. svec. 5(cont.): 78 (1819).

           Index Fungorum number: IF 146563; Facesoffungi number: FoF 11197, Fig. 1

Description: see Videira et al. (2017).

Material examined: see Videira et al. (2017).

Fig. 1 Phloeospora ulmi (CBS 613.81, re-drawn from Fig. 39 in Quaedvlieg et al. 2013). a Conidiomata bursting through host tissue. b Conidiogenous cells. c Conidia. Scale bars = 10 µm.

Importance and distribution

Phloeospora has 72 species epithets in Index Fungorum (2022), but several species have been transferred to other genera such as Allelochaeta, Ascochyta, Cercoseptoria, Cylindrosporium, Diplodia, Diplodina, Leptosphaeria, Mycosphaerella, Neocamarosporium, Neophloeospora, Phloeosporella, Pleospora, Pseudocercospora, Pseudocercosporella, Septoria, Sphaerulina, Stagonospora and Stromatoseptoria. Phloeospora has a wide distribution including Africa (Ethiopia, South Africa), Asia (Iran), Australia, Europe (England, Italy, Poland, Scotland), North America (Canada, the United States). Fresh collections of Phloeospora are needed as only one species has sequence data.


Quarantine significance

Phloeospora may be of quarantine concern as it causes disease on economically important crops such as Mulberry (Morus spp.) in Europe (Turkey) (Soylu et al. 2002).



Quaedvlieg W, Verkley GJM, Shin HD, Barreto RW et al. 2013 – Sizing up Septoria. Studies in Mycology 75, 307–390.

Soylu S, Kurt S, Soylu E. 2003 First report of Phloeospora leaf spot on mulberry caused by Phloeospora maculans (= Cylindrosporium maculans) in the East Mediterranean region of Turkey. Plant Pathology 52, 415–415.

Verkley GJM, Priest MJ. 2000 – Septoria and similar anamorphs of Mycosphaerella. Studies in Mycology 45, 123–128.

Videira SIR, Groenewald JZ, Nakashima C, Braun U, Barreto RW, de Wit PJGM, Crous PW. 2017 – Mycosphaerellaceae - Chaos or clarity? Studies in Mycology 87, 257–421.


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