Fungalpedia – Note 520, Amycosphaerella

 

Amycosphaerella Quaedvl. & Crous

Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Fungal pathogens.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1 

Classification: Mycosphaerellaceae, Mycosphaerellales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi.

Based on DNA sequence and morphology analyses, Quaedvlieg et al. (2014) introduced Amycosphaerella within Mycosphaerellaceae, Mycosphaerellales, and Dothideomycetidae in Dothideomycetes with the type species Amycosphaerella africana (described from leaf spots). Morphologically, Amycosphaerella members are similar to Mycosphaerella species but distinct in that they do not produce a Ramularia asexual morph. Amycosphaerella is characterized by solitary, globose, subepidermal ascomata, obovoid to broadly ellipsoidal, straight or incurved asci, hyaline, bi- to triseriate, overlapping, fusoid-ellipsoidal with obtuse ends, straight, medianly 1-septate, guttulate ascospores (Quaedvlieg et al. 2014). Currently, two species accepted in this genus (A. africana and A. keniensis) were described from leaves of Eucalyptus globulus, E. viminalis, E. cladocalyx, and Buckinghamia sp. in Australia and South Africa (Quaedvlieg et al. 2014, Videira et al. 2017).

Type species: Amycosphaerella africana (Crous & M.J. Wingf.) Quaedvl. & Crous

Other accepted species: Species Fungorum – search Amycosphaerella

Figure 1 –Morphology of Amycosphaerella africana. a Asci. b Ascospores. c Germinating ascospores. Scale bars: a–c = 10 μm. Redrawn from Crous and Wingfield (1996).

 

References

Crous PW, Wingfield MJ. 1996 – Species of Mycosphaerella and their anamorphs associated with leaf blotch disease of Eucalyptus in South Africa. Mycologia, 88(3), 441–458.

Quaedvlieg W, Binder M, Groenewald JZ, Summerell BA et al. 2014 – Introducing the consolidated species concept to resolve species in the Teratosphaeriaceae. Persoonia-Molecular Phylogeny and Evolution of Fungi 33(1), 1–40.

Videira SIR, Groenewald JZ, Nakashima C, Braun U et al. 2017 – Mycosphaerellaceae–chaos or clarity?. Studies in Mycology 87, 257–421.

 

Entry by

Zhang X, Excellence Center of Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, China

 

(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)

 

Published online 9 December 2024

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