Tyrannosorus Unter. & Malloch, Mycol. Res. 99(8): 910 (1995).
Saprobic on host. Sexual morph: Ascomata immersed to erumpent, black, solitary, compound, globose to subglobose, black, setose, ostiolate. Ostiole conspicuous at the apex, with long neck to papilliform, filled with periphysis. Peridium multi-layered, thick at the sides, base and apex, composed of brown to black thick-walled pseodoparenchymatous cells forming a textura angularis. Asci 8-spored, bitunicate, clavate to broadly clavate, pedicellate, thin-walled, smooth, evanescent. Hamathecium lacking. Ascospores biseriate, ellipsoid to fusiform, light brown to brown, striate, usually two-celled, normally equal, transverse septa obviously shrink, smooth-walled. Asexual morph: Mycelium from culture composed of light brown, septate hyphae. Conidia light brown, allantoid, lunate, sometimes cylindrical (Adapted from Zhang et al., 2011).
Type species: Tyrannosorus pinicola (Petrini & P.J. Fisher) Unter. & Malloch
Notes: Tyrannosorus was introduced by Untereiner & Malloch (1995) based on its saprophytic lifestyle and morphological characters such as immersed to erumpent ascomata, absence of a sub-cuticular stroma which resembles Caproventuria. Recently, Shen et al. (2020) introduced two combinations T. hanlinianus, T. hystridoies and two new species T. lichenicola and T. pini-sylvestris to Tyrannosorus. Tyrannosorus is morphologically and phylogenetically a distinct and well-defined genus in Venturiaceae. Molecular markers available for Tyrannosorus are LSU, SSU, ITS, BTUB, RPB2 and TEF-1.