Tiania Ning Jiang 2025, gen. nov.

Tiania Ning Jiang gen. nov. Etymology. In honor of Chinese taxonomist Prof. Dr. Chengming Tian for his contributions for forest pathogens. Type species. Tiania chinensis Ning Jiang. Description. Pseudostromata immersed to semi-immersed in the bark, scattered, conical, with perithecia arranged irregular. Ectostromatic disc grey to brown, circular to ovoid. Ostioles brown to black. Perithecia flask-shaped to spherical. Asci hyaline, with chitinoid, refractive ring, clavate to elongate-obovoid, 8 - spored. Ascospores biseriate, cylindrical to allantoid, thin-walled, hyaline, 0–1 septate. Conidiomata acervular in tree branches and sporodochial in culture, aggregated, immersed to semi-immersed, pulvinate. Conidiophores indistinct, usually reduced to conidiogenous cells. Conidiogenous cells hyaline, smooth, cylindrical to ampulliform, phialidic. Conidia aseptate, hyaline, smooth, multi-guttulate, fusoid, cylindrical to allantoid, constricted at the middle or not. Notes. The newly proposed genus Tiania is phylogenetically closely related to Diaporthostoma within the family Diaporthostomaceae (Fig. 1). Morphologically, Tiania can be distinguished from Diaporthostoma by its formation of stromatic tissue and its cylindrical to allantoid ascospores (Fan et al. 2018).