Fungalpedia – Note 1242, Vonarxella

 

Vonarxella Bat., J.L. Bezerra & Peres

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

Index Fungorum, Facesoffungi, MycoBank, GenBank.

Classification: Saccardiaceae, Incertae sedis, Incertae sedis, Incertae sedis, Pezizomycotina, Ascomycota, Fungi

The type species was collected from leaves of Dipteryx alata in Brazil and is characterized by flattened, circular, multi-loculate, hemisphaerical ascostromata, with meandering cells, arranged and branching from the central to the outer rim, dark brown to black pseudoparenchymatous cells of peridium, 8-spored or more, bitunicate, fissitunicate, cylindricclavate to clavate asci, with septate, hypha-like pseudoparaphyses and hyaline, obovoid to ellipsoidal, 1-septate ascospores (Doilom et al. 2018). Vonarxella resembles Schizothyrium based on its ascostromata being flattened, and multi-loculate, a peridium comprising irregular meandering arrangement of dark brown, compact cells, poorly-developed at the base, and ascospores are hyaline, 1-septate, slightly constricted at the septum, and wider in upper cell (Doilom et al. 2018). Batista et al. (1965) accommodated the genus in Schizothyriaceae, while von Arx & Müller (1975) treated the genus in Saccardiaceae Höhnel. Doilom et al. (2018) re-examined the type specimen of V. dipterygis and reinstated the genus in Schizothyriaceae.

Type species: Vonarxella dipterygis Bat., J.L. Bezerra & Peres [as ‘diptericis’], Riv. Patol. veg., Pavia, sér. 4 1(1-2): 62 (1965).

Other accepted species: Species Fungorum – search Vonarxella.

 

References

Batista AC, Bezerra JL, Peres GE. 1965 – Vonarxella e outros novos Ascomycetes. Rivista di Patologia Vegetale 61–69.

Doilom M, Hyde KD, Phookamsak R, Dai DQ et al. 2018 – Mycosphere Notes 225–274: types and other specimens of some genera of Ascomycota. Mycosphere 9, 647–754.

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 3 April 2026

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