Vonarxella Bat., J.L. Bezerra & Peres, Riv. Patol. veg., Pavia, sér. 4 1(1-2): 61 (1965).
MycoBank number: MB 5753; Index Fungorum number: IF 5753; Facesoffungi number: FoF 04673; 1 morphological species (Species Fungorum 2020), molecular data unavailable.
Type species – Vonarxella dipterygis Bat., J.L. Bezerra & Peres [as ‘diptericis’], Riv. Patol. veg., Pavia, sér. 4 1(1-2): 62 (1965).
Notes – 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, cylindric- clavate 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.
Species
Vonarxella dipterygis