Nigrograna Gruyter, Verkley & Crous

Xu, Rui-Fang, Karunarathna, Samantha C., Phukhamsakda, Chayanard, Dai, Dong-Qin, Elgorban, Abdallah M., Suwannarach, Nakarin, Kumla, Jaturong, Wang, Xiao-Yan & Tibpromma, Saowaluck, 2024, Four new species of Dothideomycetes (Ascomycota) from Para Rubber (Hevea brasiliensis) in Yunnan Province, China, MycoKeys 103, pp. 71-95 : 71

Nigrograna Gruyter, Verkley & Crous

Notes.

Nigrograna was introduced by De Gruyter et al. (2013) with N. mackinnonii as the type species. Nigrograna has 32 epithets in Index Fungorum (2024). Ahmed et al. (2014) transferred N. mackinnonii to Biatriospora , based on multigene phylogenetic analysis. Kolařík et al. (2017) introduced four new endophytic species viz. B. antibiotica , B. carollii , B. peruviensi , and B. yasuniana in Biatriospora , based on morphology and multigene phylogeny and, later, Kolařík (2018) synonymised these four species under Nigrograna . The sexual morph of Nigrograna is characterised by globose, immersed or less commonly superficial ascomata, bitunicate, fissitunicate 8-spored asci with short stipe and knob-like base, asymmetric, fusoid, 1-3-septate, pale to chocolate brown, smooth or faintly verrucose ascospores ( Jaklitsch and Voglmayr 2016). The asexual morph is characterised by globose to subglobose or pyriform pycnidia, solitary terminal phialides conidiophores, ampulliform, lageniform or subcylindrical phialides, oblong, cylindrical or allantoid conidia, sometimes ellipsoid and 1-celled ( Jaklitsch and Voglmayr 2016; Lu et al. 2022). In this study, we introduced one new species isolated from rubber tree, based on morphology and phylogeny.