Neoleptosphaeria Ariyawansa & K.D. Hyde, gen. nov.
Index Fungorum number: IF551464, Facesoffungi number: FoF 01157
Etymology: The generic epithet, neo (Lat., new), refers to the similarity to Leptosphaeria.
Pathogenic on wood, bark and fruits of herbaceous or woody plants in terrestrial habitats. Sexual morph: undetermined.Asexual morph:Conidiomata (350–)400–500 μm wide, semi-immersed to immersed, globose, papillate, or with a short cylindrical neck. Conidiomatawall composed of randomly arranged, polygonal, scleroplectenchyma cells. Conidiogenous cells welldifferentiated, cone-shaped. Conidia ovoid-oval to subcylindrical, eguttulate or with 1-2 minute guttules.
Notes: Neoleptosphaeria is introduced to accommodate Leptosphaeria rubefaciens (Togliani) Gruyter et al., in Leptosphaeriaceae, and it is monotypic. Phylogenetically Neoleptosphaeria is close to Pseudoleptosphaeria, introduced in this study, and both genera form distant clades from the Leptosphaeria sensu stricto clade. This was also shown by Alves et al. (2013) and De Gruyter et al. (2013). Neoleptosphaeria differs from Pseudoleptosphaeria in the structure of the conidiomata wall (scleroplectenchyma versus pseudoparenchymatous), nature of the spore wall (guttules versus smooth) and the host (usually on Malus spp. versus Populus tremuloides). Therefore, to provide a stable taxonomy we introduce Neoleptosphaeria.
Type species: Neoleptosphaeria rubefaciens(Togliani) Ariyawansa & K.D. Hyde,comb. nov.