Dematiotubeufia Y.Z. Lu, Boonmee & K.D. Hyde, Fungal Diversity 92: 160 (2018).
Index Fungorum number: IF 554828; Facesoffungi number: FoF 04705; 1 morphological species (Species Fungorum 2020), 1 species with molecular data.
Type species: Dematiotubeufia chiangraiensis (Boonmee & K.D. Hyde) Y.Z. Lu, Fungal Diversity 92: 162 (2018).
≡ Helicoma chiangraiense Boonmee & K.D. Hyde, in Boonmee, Rossman, Liu, Crous, Bhat, Chukeatirote, Jones & Hyde, Fungal Diversity 68: 271 (2014).
Notes: Dematiotubeufia was introduced based on morphology and phylogenetic analysis. It is characterized by dark brown to black, shiny ascomata with distinct ostioles, and cylindrical asci with straight to slightly curved fusiform ascospores (Boonmee et al. 2014b, as Helicoma chiangraiense; Lu et al. 2018b).