Mycosphaerellales » Mycosphaerellaceae » Sphaerulina

Sphaerulina myriadea

Sphaerulina myriadea (DC.) Sacc., Michelia 1(no. 4): 399 (1878).

≡ Sphaeria myriadea DC., Fl. franç., Edn 3 (Paris) 5/6: 145 (1815).

           Index Fungorum number: IF 189222; Facesoffungi number: FoF 11220, Fig. 1

Description: see Videira et al. (2017).

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

Fig. 1 Sphaerulina myriadea (HHUF 29940, holotype, re-drawn from Fig. 8 in Crous et al. 2011). a Erumpent ascomata. b Longitudinal section of ascomata. c Ascus. d Apices of asci. e Ascospores. Scale bars: a = 200 μm, b–e = 10 μm.

 

Importance and distribution

There are 123 Sphaerulina epithets in Index Fungorum (2022), but many species have been transferred to other genera such as Appendichordella, Clypeosphaerulina, Davidiella, Dothiora, Gnomonia, Lauderlindsaya, Leptosphaerulina, Lichenochora, Lichenopeltella, Lizonia, Lophiostoma, Melanconis, Metasphaeria, Microdochium, Mycosphaerella, Normandina, Obryzum, Phaeosphaeria, Phaeospora, Phomatospora, Phragmoporthe, Phragmosperma, Pontogeneia, Pseudosydowia, Saccothecium, Trichothelium, and Wettsteinina. Sphaerulina comprises 17 species known on various host plant such as Acorus calamus (Acoraceae), Alnus glutinosa (Betulaceae), Amelanchier sp. (Rosaceae), Berberis vulgaris (Berberidaceae), Betula platyphylla (Betulaceae), Cassiope hypnoides (Ericaceae), Centella asiatica (Apiaceae), Cercis siliquastrum (Fabaceae), Chaenomeles sinensis (Rosaceae), Eucalyptus sp. (Myrtaceae), Ficus carica (Moraceae), Prunus dulcis (Rosaceae), Rhododendron sp. (Ericaceae) and Zelkova serrata (Ulmaceae). Sphaerulina has wide geographical distribution including Asia (China, Japan, South Korea), Europe (Belgium, France, Greece, Netherlands, New York, Switzerland, United Kingdom), South America (Argentina) and the United States (Hawaii).

 

Quarantine significance

Sphaerulina may be of quarantine concern as it causes serious diseases, such as leaf spot, canker disease, flyspeck disease on many economically important crops (Crous et al. 2011).

 

References

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.

Crous PW, Tanaka K, Summerelp BA, Groenewald JZ. 2011 – Additions to the Mycosphaerella complex. IMA Fungus 2, 49–64.

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

Verkley GJ, Quaedvlieg W, Shin HD, Crous PW. 2013 – A new approach to species delimitation in Septoria. Studies in Mycology 75, 213–305.

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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