Orthobellus A.A. Silva & Cavalc., in Silva et al., Publicações Inst. Micol. Recife 691: 4 (1973).
MycoBank number: MB 3639; Index Fungorum number: IF 3639; Facesoffungi number: FoF 01955; 3 morphological species (Species Fungorum 2020), molecular data unavailable.
Type species – Orthobellus leguminosarum A.A. Silva & Cavalc., in Silva et al., Publicações. Instituto de Micologia da Universidade de Pernambuco 678: 5 (1973).
Notes – Orthobellus was included in the Schizothyriaceae (Silva et al. 1973, Wijayawardene et al. 2014b). However, it was treated as Dothideomycetes genera incertae sedis by Phookamsak et al. (2016). Doilom et al. (2018) transferred this genus to their new family Johansoniaceae based on morphology. Orthobellus is similar to Johansonia in having membranous ascomata which lack ostioles, narrowly anastomosing pseudoparaphyses thin-walled at the base and ascospores that are hyaline, ovoid to ellipsoidal, 1-septate, with an apical cell wider than basal cell (Doilom et al. 2018). It differs from Johansonia in forming short, brown, aseptate hyphae at the base of ascomata, and clavate asci. More collections with sequence data are needed to confirm the placement of Orthobellus within Johansoniaceae.