Tiania Ning Jiang, 2025

Jiang, Ning, Xue, Han & Li, Yong, 2025, Novel genus and species of Diaporthostomataceae (Diaporthales) in China, IMA Fungus 16, pp. e 145422-e 145422 : e145422-

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).

Figures

Figure 1. Phylogram of Diaporthales resulting from a maximum likelihood analysis based on the ITS, LSU, rpb 2 and tef 1 gene sequence. Numbers above the branches indicate ML bootstrap values (left, ML BS ≥ 50 %) and Bayesian posterior probabilities (right, BPP ≥ 0.90). The tree is rooted with Nakataea oryzae (CBS 243.76) and Pyricularia grisea (Ina 168). Isolates from the present study are marked in blue.