Pyrenochaetopsis huizeanum Z.F. Yu & L.P. Chen, 2025

Chen, Lai-Ping, Duan, Zhong-Wen, Zhagn, Xian-Kun, Zhan, Yu-Chen & Yu, Ze-Fen, 2025, Pyrenochaetopsis huizeanum sp. nov. (Pyrenochaetopsidaceae, Pleosporales) from rocky desertification soil in Yunnan Province, Phytotaxa 708 (3), pp. 287-295 : 290

Pyrenochaetopsis huizeanum Z.F. Yu & L.P. Chen , sp. nov. ( FIGURES 2 )

MycoBank Number: 855091

Etymology:refers to geographical origin of the type strain.

Holotype: YMF 1.06525

Asexual morph on OA. Hyphae hyaline to pale brown, septate, branched, smooth-walled, 1.5–2.5 μm wide. Pycnidia brown, superficial or immersed in culture colonies, solitary or clustered, subglobose, 170–250 × 220–300 μm. Pycnidia wall brown to bark brown, composed of pale brown cells of textura angularis, 5.5–9.5 μm diam. Seta dark brown, erect or curved, septate, straight or curved, smooth-walled, 37–76 μm long. Conidia hyaline, ellipsoidal to cylindrical, aseptate, smooth-walled, with two small guttulate, 3.5–5 × 1–2.5 μm. Sexual morph and chlamydospores not observed.

Cultural characteristics: Colonies on PDA surface pale olivaceous-gray, reverse olivaceous-gray, velvety, circular, hyphae dense, entire margin, reaching 45 mm diam in 20 days. Colonies on OA surface pale olivaceous-gray, reverse white, hyphae dense, entire margin, reaching 40 mm diam in 20 days. Colonies on PCA surface pale black, repressed, reaching 50 mm diam in 20 days.

Material examined: CHINA. Yunnan Province, Huize city, isolated from soil of rocky desertification areas (26°44′ N, 103°32′ E; 1880m above sea level), October 2020, Z.F. Yu, Holotype: YMF 1.06525 preserved by lyophilization (a metabolically inactive state) in State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, ex-type was preserved at the China General Microbiological Culture Collection Center ( CGMCC 3.16090 ).

Additional cultures examined: CHINA. Yunnan Province, Huize City, isolated from soil of rocky desertification areas, October 2020, Z.F. Yu, living culture H95, stored in a metabolically inactive state. Other information are same as those of YMF 1.06525.

Figures

FIGURE 2. Pyrenochaetopsis huizeanum (YMF 1.06525, holotype). (a, b, c) Colony at 25℃ for 20 days on PDA, OA and PCA, respectively, (d–e) Conidiomata superficial or immersed in culture colonies, (f) Seta, (g) Conidia. Scale bars:a–c, 20 mm; d–g,10 µm.